Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5882e3e6ff8a970…

MALICIOUS

PDF

64.7 KB Created: 2020-11-28 23:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c059d5fdd6db6159da487d34d0846bbc SHA-1: dc04136d048c110c70d294fcb20a7d6b508af8d0 SHA-256: c5882e3e6ff8a970e0e1f6cb5e14606bf1a00c5165e1da016fd8a9611c73123f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/123?utm_term=tamagotchi+classic+apk+failed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4466408/normal_5fb477f6423bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fa6d44ddacbc.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/xiluzebex.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/8cc2478d6c6a6d.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/0cd4bf86-b80b-4107-a3e8-2ad8e3ed7534/govawexevanij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9247bc57-4c27-4c13-b66d-aae226f603bd/63782618080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822f5ec9-dbb2-43d3-a70d-5b928967ad4a/xasos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbce85d6-a83c-4033-aa8f-3d7cd27d716c/kugusedopibupiremowidetow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45509a68-ccb8-4fb2-8a3a-a147ac23bf6d/chun_li_hot_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c51d70e-6935-4d1b-a9f7-20d2fe87ea78/pet_supplies_plus_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7786bf2-1fdb-406d-ba3b-ccea2c4704aa/sejilapalokuvikizojexed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b895bc42-efbc-4fd6-825b-8ba2dd55b11e/nexesebanem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14112fee-1a84-4d18-bec3-962a26b50a11/smapi_stardew_valley_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce93997f-2170-4510-80ef-8cd2ece99e82/pier_one_return_policy_canada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 5484 bytes
SHA-256: 4de6cfd9ab0648c4b4c02c8eafc694081419c3c59ac3a50ff400a8dda656a134
font_01_sfnt_off0000c2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 2044 bytes
SHA-256: f6bc48666be18a225c977d5af36ad2ecedda333d56a6121bb84361b0045fdee4
font_02_sfnt_off0000cc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6F 12384 bytes
SHA-256: 5220f79de7e06910d138687e2ca93ca632095231b90070beab4a840dc3b113be

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