Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87e3a773057854f…

MALICIOUS

PDF

69.2 KB Created: 2021-02-13 04:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8697def4fbdbd5bc27671ce96d09f276 SHA-1: 87a754ad021fc57854f4425a562adb8e9e53947e SHA-256: a87e3a773057854f9c5bb4744738700d36aea5a0b7b1ed829380d8cc027c7831
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to redirect users to potentially harmful sites. The primary URL, 'https://bologen.ru/wb?keyword=anti%20ragging%20form%20for%20jexpo%202019', is presented as a lure. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate a phishing or traffic-generation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=anti%20ragging%20form%20for%20jexpo%202019 PDF link annotation
    • http://zuwazari.22web.org/fubaxan.pdfIn PDF document text
    • http://potobol.22web.org/5586811128.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/ee272481a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/13_eyewitness_news_houston_reporters.pdfIn PDF document text
    • http://riwesanis.epizy.com/buffet_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/57735550112.pdfIn PDF document text
    • http://zexukojol.rf.gd/android_apps_creator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/75112443819.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/lie_nielsen_honing_guide_vs_veritas.pdfIn PDF document text
    • http://gozajogef.rf.gd/13312789042.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/free_apache_server_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/mamuzujufuwa.pdfIn PDF document text
    • http://kevusej.epizy.com/factoring_quadratics_worksheet_algebra_1.pdfIn PDF document text
    • http://vagonaziluro.epizy.com/matalan_bedding_valance_sheets.pdfIn PDF document text
    • http://pabaxonewopux.epizy.com/asme_bpe_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/10601540597.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/witcher_3_blood_and_wine_mutations_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/sopizadukolubopozuporak.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/google_chrome_apk_para_pc_32_bits.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 5628 bytes
SHA-256: 4ccfa2d65b63697d1963776d95a236b8e2fc8053e9ece2b765b64c4559fde350
font_01_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 10912 bytes
SHA-256: 5792bcaa8c9f255c39aec4b06a903ca989bce29208c7e3d445384e836af49a3b

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