Malicious PDF — malware analysis report

Static analysis result for SHA-256 53680791dea3e765…

MALICIOUS

PDF

70.6 KB Created: 2021-02-26 21:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4a10bd69f136718ce9b725de3c0cdd0d SHA-1: 1055b3f5a772901a6d876efdf9ea089031063aa9 SHA-256: 53680791dea3e765ffdb4f2027ae96de01ca349a8b1eeb7b84a1a302d23b776e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or phishing campaign. The embedded URLs point to various external resources, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wb?keyword=marketing%20goals%20for%20small%20business PDF link annotation
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/wukeluv.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/can_you_watch_harry_potter_on_demand.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/92e6fc1eb0.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/8d7769a2.pdfIn PDF document text
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/9391059.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/voxabi.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/waxanilomivekufex.pdfIn PDF document text
    • https://vizefibamoraxob.weebly.com/uploads/1/3/4/6/134613498/xusupogiwulevup.pdfIn PDF document text
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/1042298.pdfIn PDF document text
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/6581999.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/838dbc0.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/83339095482.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/bontrager_trip_1_user_manual.pdfIn PDF document text
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/8105706.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jupudizadid/dexoligelonebine.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/10268066002.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_to_differentiate_between_bacterial_and_viral_throat_infection.pdfIn PDF document text
    • http://desejole.myartsonline.com/3428615889.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/born_a_crime_discussion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/80481771158.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_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 5180 bytes
SHA-256: 08803e23c18faea1ed7e14558839bee7ccccafcef587b1d0113cda3f941e4737
font_01_sfnt_off0000dd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 9824 bytes
SHA-256: ab61cc0d28221608881953ec8d4f5f28a5b076da8bf2f44b48e05c2bc80c8313
font_02_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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