Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e252be64efc106b…

MALICIOUS

PDF

83.2 KB Created: 2021-03-01 00:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 024484b8112a285a5be065bf5120d6f3 SHA-1: 3c9f46114e785f914c75fd54923bcd8f13283660 SHA-256: 1e252be64efc106b988f88860ba3eb8f843acb16464c8b037e3eff7a29b7d3c2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used to distribute malicious content or conduct phishing. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=technics+sb+a34+caracteristicas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374540/normal_5feb7eddcff9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60113c5f1c987.pdfIn PDF document text
    • https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/6433133.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/1828336.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/9049307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476001/normal_601a7f2095466.pdfIn PDF document text
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/3352340.pdfIn PDF document text
    • https://tutiwelureno.weebly.com/uploads/1/3/4/7/134714557/f2969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412158/normal_5fe06c7d837ad.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/el_profeta_khalil_gibran_sobre_el_matrimonio.pdfIn PDF document text
    • http://zijogeminevuxa.iblogger.org/formal_email_ending_greetings.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/golds_gym_xr45.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/3828578.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/definicion_legal_de_titulos_de_credito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gawupuzilolo.epizy.com/chrome_extension_file.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/fuwakegigibinemerugaka.pdfIn PDF document text
    • http://runoxujozu.rf.gd/58288899208.pdfIn PDF document text
    • http://dejedizanabi.epizy.com/arduino_free_mac.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_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 3652 bytes
SHA-256: b3669f80acf99fb8387b809d65fc41257535a12d2a6b809e4905a981e889bbe9
font_01_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 5196 bytes
SHA-256: a67b4afc03dc096012c413e53e9f1077dd295a5bd8cda8d9d5a28ec6f30d42ff
font_02_sfnt_off00011040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 15340 bytes
SHA-256: 8c829e47b78a2df40ad36ee1c8e5842bdd5f732d0689d86172a9be69b3d735fe

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