Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0fb27486a3a5b2…

MALICIOUS

PDF

111.2 KB Created: 2021-03-10 08:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54917b2cc3e19cf11d096d1c80c5aa29 SHA-1: 38967b6043861440b71f44aa08afa7ebd5a4b91c SHA-256: be0fb27486a3a5b228b64b2a75ac2397222ca4c08f335de95b9a3f9c7d83886f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ponafet.ru/award?keyword=mockingjay+part+2+script+pdf PDF link annotation
    • http://lnstagramlivesupportcenter.com/74249976739gaolb.pdfIn PDF document text
    • http://lasomupigo.iblogger.org/pulis.pdfIn PDF document text
    • http://leadtop.co/3452376693mc6i1.pdfIn PDF document text
    • http://powerpoint4you.ru/ford_mustang_gt_convertible_for_sale_near_menq15e.pdfIn PDF document text
    • http://slimerecipe.org/anadarko_public_schools_enrollment_formstg3je.pdfIn PDF document text
    • http://ubzvp.com/realize_reader_answer_key4wnvu.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/92565753161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/inferno_dan_brown_cast.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/xiwimurejafez.pdfIn PDF document text
    • http://bofozimugonofa.rf.gd/wakidugijivuvugemutabuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52d27f8-1cf9-4063-9794-2643e21b2494/lewelujivemarewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec8a60c-477e-42ce-8eba-520e3b801700/nasemumiwivuregidexabamar.pdfIn PDF document text
    • http://diribiboturo.epizy.com/7544419311.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/nujizikopulam.pdfIn PDF document text
    • http://velumosak.epizy.com/57118144127.pdfIn PDF document text
    • http://gidovofivoj.epizy.com/67550302910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08c4821-24eb-47dd-9e93-3900318e57c9/59063500382.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/love_you_brother_song.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_off00017592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17592 5672 bytes
SHA-256: 313a9653adbc2e12c0499015781f37f811771f86082692c576b6790be093a00c
font_01_sfnt_off00018917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18917 11836 bytes
SHA-256: 1ad1a2e5c12d1eb7673a33d8088f9da24e07f1f96623c343491d4a6afd110153

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