Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb0701732aaf32d…

MALICIOUS

PDF

74.3 KB Created: 2020-12-19 07:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb4f21d5ebf4de52f4a8ba34f671d9de SHA-1: 91004f7e2bb76b4041dca9fe35beb6b0f45e63d5 SHA-256: fcb0701732aaf32d9551604a8b364be3a8bb6108542875634a76916aa0deb756
156 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. 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
  • 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.
  • 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://trafffi.ru/123?utm_term=arquitectura+barroca+en+mexico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fa6c6de7af9b.pdfIn PDF document text
    • https://nufivinob.weebly.com/uploads/1/3/4/6/134682897/losoj_wekovuji_lofonifetafif_tusolajifufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5fc797fb9d881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_5fbb1826666de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5fa01a79eb688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fd03f9973d49.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/pufuzefisuf.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/lerevazubofobemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5fc842a176ba3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc27abee9fc3622d52c1c80/t/5fcfc2668639e47cbc0ee849/1607451239368/kinumavujegirutonusapu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1cf72dd96f5918b6f25d/1606294776747/zonudowovikirekexajona.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77a4610d6a92a736c4974/t/5fd6f92e96ed101a3e565748/1607924015756/wugiralozokuwijekijet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbf500f7af3919d399d7/1606220791838/exempted_establishments_members_meaning_in_hindi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcba3646033b444b395ad1/t/5fdcd9cadb55d240292fedda/1608309195651/voxinipusovu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5740abdb33045eee0e015/t/5fc66bd2645712565418a48b/1606839251095/radio_k_poper_100_hits.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 5056 bytes
SHA-256: 9f0259f9e1adb02ef5af28fa0e34fe8b36becba436b4af26e129247c81e24c72
font_01_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 11420 bytes
SHA-256: 4987144debc90d9cb8193f7b56b4ddb4b3c0deceb39ea31f8acd0fdd7dde3790

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