Malicious PDF — malware analysis report

Static analysis result for SHA-256 78782147d514fd29…

MALICIOUS

PDF

82.8 KB Created: 2021-02-21 14:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f86fe556d396d6cccc7ca389787e16a SHA-1: 97568c3b3af30a9023eccf08c7cf4fe766452121 SHA-256: 78782147d514fd29e37b925e1d2a98cad2a05d7a40e55aa87031eeec69dbd63e
156 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. The PDF contains a large number of external links, suggesting it is part of a link farm or used for SEO manipulation to distribute malicious content. The embedded content, though heavily obfuscated, likely serves as a lure to direct users to malicious URLs.

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://baarspo.ru/aws?utm_term=suzuki+drz400+service+intervals PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5fdcdbf3c894b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_60073839ec16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_601fc779cfc3b.pdfIn PDF document text
    • https://binamakizixevuj.weebly.com/uploads/1/3/2/8/132814618/c028fc173317.pdfIn PDF document text
    • https://nozusetemakofam.weebly.com/uploads/1/3/1/4/131408546/120c87f7ca78e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_5fe2951c424b2.pdfIn PDF document text
    • http://itnegozio.info/what_ink_for_canon_mp250igujn.pdfIn PDF document text
    • http://gufutaca1.xyz/how_to_run_diagnostic_test_on_samsung_dryer1rrak.pdfIn PDF document text
    • http://znakomstva18x.site/zuzutelotixoweten74kcf.pdfIn PDF document text
    • http://inmyshtangen.xyz/kaxubarivavujedegowurinebyx7yg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fe30bec4a941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_602d99d31b2b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481168/normal_5fe4cd25db512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_6012609f8f855.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/xamibudasagas/happy_new_year_songs_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/yes_boss_movie_video_song_tinyjuke.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_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 5212 bytes
SHA-256: 582c53c634814e111ee3eeec9b66189e59a71c0363d8c729c6ed3934094cbda9
font_01_sfnt_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 10488 bytes
SHA-256: cc0c88f7a82b8109e7f93e5787165f7e1081b145ce187621bdd12f2b0c7f3753
font_02_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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