Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c675c67b9aad366…

MALICIOUS

PDF

93.6 KB Created: 2021-05-26 06:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b52d128c9a1cd4ba10c47199718e2ec SHA-1: 507bb02edbaa57f506e383470c5713374050212d SHA-256: 6c675c67b9aad3666ca2237a1fe3b63603a9fa9d7ab2f074e3a2fbceb117df98
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=kala+jadu+book+in+urdu+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454281/normal_606d3a3b4b0fc.pdfIn PDF document text
    • https://dekodisiga.weebly.com/uploads/1/3/6/0/136051758/pevode-miturebes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408599/normal_5ffc3a411911a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_601eca52b1e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_60628cd4764b6.pdfIn PDF document text
    • https://kewetarutedur.weebly.com/uploads/1/3/0/9/130968996/nidanewa.pdfIn PDF document text
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/650276.pdfIn PDF document text
    • https://temizugejifo.weebly.com/uploads/1/3/1/3/131384470/jukilewavasukezuxen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5fd28b8c3d49d.pdfIn PDF document text
    • https://ribigitapupag.weebly.com/uploads/1/3/4/8/134887221/fefitet_fisotuse_dipusiviwigazu_zoribabefabivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffbdcd01a477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_606937e8bee3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_606de10c5c66f.pdfIn PDF document text
    • https://xepepewidejumu.weebly.com/uploads/1/3/4/6/134669023/6703543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4cc4f8-9474-4867-b76f-b343ce1e73ef/wowarusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60fbf41-736f-4f28-8045-73ecc09fad3d/how_do_you_fix_a_sewing_machine_that_skips_stitches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ce1292-9eb4-4a1e-b29b-326f267d92a0/how_to_connect_epson_l355_to_wifi_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f3b74d-1a08-4bf9-bb57-1e2398a0bd69/adobe_premiere_pro_cc_2019_free_download_softonic_crack_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12c789b-55f8-47c6-b61a-fe8954a20fc2/56810556184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d21c572-f0cd-40da-bea9-d57bfd177d1b/tegofegizuzitepojeritomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16ba774-bdf8-4d71-9595-16bf32abbbb2/75584477879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f458d395-edc8-4738-9ba7-c70a407c5dd3/wewojelirasenobitikix.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_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 5200 bytes
SHA-256: 994e48a2e8b05af05fe6fb68f2e8db31f5d4fc4b0d21448cae772db6d880fd48
font_01_sfnt_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 10836 bytes
SHA-256: c2fa4577c282cc7ddf59d147930d9807cddf661863e9953991c2227ab583024a
font_02_sfnt_off00013aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAA 18356 bytes
SHA-256: 8f3a9a057d23d3331d15d08c5b1b0340238f3e611b8dd734aae7bfab3002cead
font_03_sfnt_off00015744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15744 4388 bytes
SHA-256: 7a30b4ecc1363ca1c46c0b26744065ab9617676dd5853166d089a84b4e0cb506