Malicious PDF — malware analysis report

Static analysis result for SHA-256 be42e6540329462e…

MALICIOUS

PDF

87.6 KB Created: 2021-03-31 22:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0f34f5ae4bee55140b74e66f72b92bc4 SHA-1: ac9630c88e8eca7641be713397da6f79315d3480 SHA-256: be42e6540329462ed0a57dc24bd4437393ce1939812419c3aa85a6ece3088b73
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on disposable domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to 'Panasonic viera plasma screen problem', suggesting a lure to attract users searching for technical support or product information. No scripts were extracted, but the presence of numerous malicious and suspicious URLs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=panasonic+viera+plasma+screen+problem In PDF document text
    • https://bugabomusajo.weebly.com/uploads/1/3/4/5/134509224/giretazod-nawuxogibijo-keresutom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5fc7e665ecf61.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/466ab91a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fd6c2f5ae562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_600dcb95f08ae.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/8156316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453540/normal_604cc27f9cd0d.pdfIn PDF document text
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/wolotomiro_wawijiripokenum_gonasoxapodewi.pdfIn PDF document text
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/mefural-jagodaxu-wujolo.pdfIn PDF document text
    • http://xetorobexojukas.22web.org/citizen_watch_wr100_price.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/5e710176e903c.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/navovesadagewif.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/45a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_60164518157a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25289a58-3b81-4d2e-9d4d-74f4627b9d1f/gijujipifenujoguviwofuja.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/januvibidutusekifujup.pdfIn PDF document text
    • http://fusifovizit.rf.gd/17791675591.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/91717291437.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/28554025844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5749182-8aa8-4d2d-b497-0d187f3c3620/dumowu.pdfIn PDF document text
    • http://pasekinewalepu.epizy.com/biblia_reina_valera_1960_para_buscar_versiculos.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/what_are_the_major_themes_of_geography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85ec4d0-27ff-4a7c-bee7-a95f2e43a121/taco_bell_jalapeno_sauce_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/dujopobivu.pdfIn PDF document text
    • http://gizejofak.epizy.com/35409461453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86322b3e-6e98-4adf-81e8-cee843bef2c7/nufoziditilaso.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/mixed_up_files_of_mrs_basil_e_frankweiler_summary.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 3604 bytes
SHA-256: dc55eb83253c964427467007fbca78f416f36e6ac6d545536812e4a593d01f63
font_01_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 5280 bytes
SHA-256: 6196a9f93f0e86ee19e2896185b5a8dbe55aaf45135983ac2ddd063dc6c9225e
font_02_sfnt_off000116f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 10492 bytes
SHA-256: 8a4283dfd2d417095ff49e46534524ec7e46b32e954df9c1d852d3e39b606e5b
font_03_sfnt_off00013aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEB 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3