Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb22f69b1f63781…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 10:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b3f5f4b8a67d12ec3c55ae3ad82f987 SHA-1: e7ae660056c4b48f869a719f5872a0c842ca62c5 SHA-256: feb22f69b1f6378196d26b5f264b85a8a04162e95b47881a70119be979abbfae
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 0.9991

Heuristics 5

  • 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.
  • 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://dafemum.ru/strik?utm_term=mockingjay+book+quotes PDF link annotation
    • https://cdn.sqhk.co/zomidami/xjiJhgH/new_music_mix_apple_watch.pdfIn PDF document text
    • http://portkamesto.site/diwotigirazuzezubalugeusidk.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/1279764.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/gegdfnT/boxing_news_jake_paul.pdfIn PDF document text
    • http://ighelperscenter.com/nukenebusevabemats8rg5.pdfIn PDF document text
    • http://makamar.online/xotatifetifaoj3f3.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/icgiyji/83144941340.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/eafadc4db248711.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/cbceb684118038.pdfIn PDF document text
    • https://begafirezudafo.weebly.com/uploads/1/3/1/4/131438667/nuremevax.pdfIn PDF document text
    • http://ecoterritory.store/clasificacion_de_las_cuentas_de_ingreso_y_egreso9c76x.pdfIn PDF document text
    • https://motodamoz.weebly.com/uploads/1/3/1/4/131452818/pezit.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/veraxawewib/wixutawokenumesuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99aa57fc-3340-44c6-ad14-f7d33f284347/rapunilelorutotivaju.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/flight_simulator_game_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/19905040577.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/jikisevasuw.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/rifufexagadozafijibuzob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf13bf7-2dde-4d0b-9c4b-b2fd7432acbc/17888461025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d44d3d8-71f5-4549-ab93-99bb7e46c6b1/howard_miller_grandfather_clock_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571df9e0-340f-4f79-9ecb-a2450d4a55ea/rinimisita.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/guide_riven_jg.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/kosakeweruxanu.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_off0000ecfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 5236 bytes
SHA-256: 781417ae39ec0a7833c076b9276a15b224d6ddfef34cb2abb178c9bab7670764
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 10488 bytes
SHA-256: 9ed34bb16c8603a9cf64c2eb10b06813a259c37f9b9387ec0518b0b361113411
font_02_sfnt_off00012294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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