Malicious PDF — malware analysis report

Static analysis result for SHA-256 80278638b6ecc75e…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 06:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ec86faa821f61ee497a564b3f81e7be SHA-1: 942afb1806e24d46fbdbf21248f18c2d3be63d66 SHA-256: 80278638b6ecc75eda90819c693d40decd2113753ca20668ad2b0cd8b5fa3297
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://pelibifir.ru/aws?utm_term=is+a+900+watt+microwave+good PDF link annotation
    • http://movizopolu.medianewsonline.com/cisco_ccna_voice_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_602e7d17e6e82.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/gawimubozusufakixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_6034917eea17f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417523/normal_5fcea966d8a8b.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/9a4be763c6.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/depidezijilozolenux.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/nisusakowufitab.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/7ea96bdd60d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6017b7fb0af39.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/when_you_reach_me_rebecca_stead_movie.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/6b965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pijakeduwu.rf.gd/40812667541.pdfIn PDF document text
    • http://pupovedifa.rf.gd/wrox_professional_assembly_language.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/dissertation_guidelines_uom.pdfIn PDF document text
    • http://vetoraj.rf.gd/analysis_of_variance.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/twilight_2008_full_movie_download_in_hindi_1080p.pdfIn PDF document text
    • http://jiporiri.rf.gd/92469956295.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/xejafurubomuxajor.pdfIn PDF document text
    • http://zobotipuzadevi.epizy.com/47419649697.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_off0000f319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 5612 bytes
SHA-256: cc32cb48fce743eeb3a14da3aa4f7f98191f701340edc863be47bf541de2b06c
font_01_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 11168 bytes
SHA-256: 91186372f6aa6e7859ba74c3032a3c8f54d4225e2504807bc911d9e0b46fb818