Malicious PDF — malware analysis report

Static analysis result for SHA-256 0295c700372eee64…

MALICIOUS

PDF

86.9 KB Created: 2021-04-07 00:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fcc736593c4e1ce05a4d1d0c0f81e8a8 SHA-1: 33e7ab6fa7960682cc0deb32ea4466eab6585606 SHA-256: 0295c700372eee64bc22d4776bdfa8d2a6eeefbd63fdf35bfd47c675067eb444
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious content. The document's structure and embedded links indicate an attempt to disguise malicious activity as legitimate search results or document access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/award?keyword=qasida+burda+sharif+urdu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368760/normal_6060bc374f297.pdfIn PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/2965333.pdfIn PDF document text
    • http://kelnoteres.xyz/elkay_water_fountain_rough_in_specsisxfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529697/normal_5fcbfc739a666.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/mopisimotod-vanumojusafaz-gibed-mozisutixileti.pdfIn PDF document text
    • https://datulexajolibup.weebly.com/uploads/1/3/0/7/130738708/kefamobolug-gefawaretawimub-karewexore.pdfIn PDF document text
    • https://zudalutotazif.weebly.com/uploads/1/3/1/3/131379026/mewozaxade_pilodo_noxewonuvo_raduw.pdfIn PDF document text
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/berivitigu.pdfIn PDF document text
    • https://bipesulevawitod.weebly.com/uploads/1/3/1/4/131437914/fugotu.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/python_dictionary_get_key_value_tupleb0yiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_6003802e3375a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_600c9be213e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_604aedc0e4618.pdfIn PDF document text
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/sixulepowil_jovadevakaxola.pdfIn PDF document text
    • http://winfreeiphone.xyz/komixevaxuru6b0ry.pdfIn PDF document text
    • http://electorat.org/sigmund_freud_books_in_teluguog48l.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/gefodib-pivog-logige-fajisodovi.pdfIn PDF document text
    • https://nuxikete.weebly.com/uploads/1/3/3/9/133997556/lunamuradar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/30697162669.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_3f411486816b4c96a83fa6ffa4936942.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/sony_bdp_s1500_universal_remote_code.pdfIn PDF document text
    • https://beb587af-1766-4a1c-893d-8c04a9882fa7.filesusr.com/ugd/f3bec4_3276a3cfd19646f7a1f6aa0e118afeec.pdf?index=trueIn PDF document text
    • https://69669160-cc20-42a3-bfef-e1e1fd1f8163.filesusr.com/ugd/8094a4_be9570900b4543c098487a5ea709f159.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/14451609167.pdfIn PDF document text
    • https://4c8e72c6-e2e3-4108-adc6-102de481692d.filesusr.com/ugd/f4b4ca_c688256ad0f44d398bd8b2927e5f99cf.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_e44eef1aab3a4baea0e4826217a91920.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012896.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12896 21440 bytes
SHA-256: ec5e10424c3fa71b7fcfa1a827b4aa12e2707277837eb57f830a162b357530b2
font_00_sfnt_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 5300 bytes
SHA-256: 0cfdaee5ece8ea4c2076c6d7fd6b1e586a7504e76ccbb621ec4567f3d668b2bd
font_01_sfnt_off00010156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 12272 bytes
SHA-256: 4143cc045c6089cf9e72b2830bbb2143bb59d22793c469b6220eaa8b3a8a1aac

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