Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb8eaa0d44123f3…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 09:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa0349e3b7e23de6e2046d8d9dffafe4 SHA-1: 1c955b61febb9931f3126e277f787e817461b875 SHA-256: 1fb8eaa0d44123f3d4fec98f33bbba11d0d071396042d6d537ba496727ef6e57
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large farm of external links, many pointing to disposable hosting, designed to redirect users to potentially malicious content. The primary lure appears to be 'Bsnl prepaid plans in gujarat pdf', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/123?utm_term=bsnl+prepaid+plans+in+gujarat+pdf PDF link annotation
    • http://xulodol.mygamesonline.org/9102483750.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/lusoko.pdfIn PDF document text
    • https://teputire.weebly.com/uploads/1/3/0/8/130813428/zenarejosa-feronibalani-foxojekipugo-zigerawuvagufog.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/gggiLjh/45686123015.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/xerejobibexiw.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/muzesogu-nelibiniwufi.pdfIn PDF document text
    • https://birijejukuz.weebly.com/uploads/1/3/5/3/135386669/zuvuj.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/jijubamavorax.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/5W12jjf/fidimizujoxewefopoderum.pdfIn PDF document text
    • https://wefisejeradez.weebly.com/uploads/1/3/4/8/134886640/kamapagorutexagotawe.pdfIn PDF document text
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/kewuvogo.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/nilonetujov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426688/normal_60017e3c7e25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481285/normal_60118ddd8fb37.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/1921663.pdfIn PDF document text
    • https://filuwanukolo.weebly.com/uploads/1/3/4/8/134874182/6f1c3f.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/4952221.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/cMzuVhi/amman_movie_songs_tamiltunes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/diccionario_strong_espanol_online.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/benijibemudorunuz.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5332 bytes
SHA-256: 76039945d76088953353d4e2df26cabeb63b0c9d57145a83f9e62438268cba3f
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 12424 bytes
SHA-256: 5d8539de541658e344d9a1e8b7e1cde7f7a68efc22d8683cca0cfc53b01d12cf

Open this report in the interactive analyzer, or submit your own file for analysis.