Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc10ee5f60ce747a…

MALICIOUS

PDF

97.9 KB Created: 2021-06-06 20:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b7ed7b2ed13e8e1ea77109cc873389b1 SHA-1: 98b74948e74f3d98e072f9c41bde53e02c05513b SHA-256: cc10ee5f60ce747af47ad1d7cd12621582c58040e7535bce891d182723c7c296
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 0.9998

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://inwebjor.ru/pbw?utm_term=south+park+wendy+kisses+cartman+full+episode+youtube PDF link annotation
    • https://gubipixuzubuf.weebly.com/uploads/1/3/4/0/134016682/tisowemapenukubet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5fd04521acc66.pdfIn PDF document text
    • https://nonuradijo.weebly.com/uploads/1/3/1/4/131406562/14cc6275179964.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4454299/normal_60b5dee785e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390995/normal_5feb2d28b343c.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/nefitoguxani-minaribivoxuna-gojulo.pdfIn PDF document text
    • https://jumuvive.weebly.com/uploads/1/3/0/7/130776409/0d0c4923a5c6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5fe753f01b6f1.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/ba8a1526.pdfIn PDF document text
    • https://tegimawemax.weebly.com/uploads/1/3/1/3/131383609/guruvixovo-gawiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_605336fd2a966.pdfIn PDF document text
    • https://jawiniralegewo.weebly.com/uploads/1/3/4/4/134492986/3696499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_604893ef312bb.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/82524405-8f0d-4913-8d34-7eacb1cd323f/foluwudajibuzaxewagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65d8005-667e-4d40-984a-8d3e5c0b82f8/god_of_war_3_ppsspp_android_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57db32fa-3e3b-4ec8-b71b-4bc627323537/crossing_positive_and_negative_jumper_cables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7875779d-d3b9-45e5-baad-61a2dd64098e/maher_zain_ak_muhabbet_mp3_indir_dur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f485cd2-d5cb-4df6-b2b9-f618dff37310/how_many_calories_in_a_renal_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ace3ec1-899f-4aa3-8c4f-087d8cf562dc/jigokixuvuwewaxuxowav.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14176 5896 bytes
SHA-256: 2f8a91d40a225249251ab2dec51a91c2f42fbfabfe0b9cadaa7b6d0afa973955
font_01_sfnt_off00015572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15572 10968 bytes
SHA-256: e8c58fa4c3b2d9d45bef03fb8d8b0c37e72f7f712a1ae14cd1b8da216c9e8dd8