Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f5bc8cc4e7d707…

MALICIOUS

PDF

107.1 KB Created: 2021-03-11 05:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 37ed876de7f8ac9f7b06f020f6d582be SHA-1: 9d7689b389ad97894176f6b3f1392ea296b87153 SHA-256: 34f5bc8cc4e7d707420ec7a23c9be3f2a40255e4d5a2b26d8b0edf899c692c73
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://zajinet.ru/strik?utm_term=computer+programming+specialist+certificate+salary PDF link annotation
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/66a6738700.pdfIn PDF document text
    • http://vinuporabomod.iblogger.org/jojadumegaw.pdfIn PDF document text
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/navuz.pdfIn PDF document text
    • http://flowerport.market/famik1ye4k.pdfIn PDF document text
    • http://afracheat2.xyz/scud_the_disposable_assassin_comicjwm2q.pdfIn PDF document text
    • https://tutajuvaxuzife.weebly.com/uploads/1/3/5/9/135976456/a33e2.pdfIn PDF document text
    • http://yblda.fun/818818418485hy0v.pdfIn PDF document text
    • http://naturmilans.fun/360811859348oxvw.pdfIn PDF document text
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/1a9fd97.pdfIn PDF document text
    • http://woodbonus.net/39476465191g7h8j.pdfIn PDF document text
    • http://mmamba.ru/muledorenonevogoxatalizag70yxd.pdfIn PDF document text
    • http://alexandreablog.com/56452690295gmpby.pdfIn PDF document text
    • http://paksorond.xyz/vice_news_jobs_usao7i8d.pdfIn PDF document text
    • https://lidalukedewad.weebly.com/uploads/1/3/4/6/134664428/1637448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60361d1d-a74e-4c2b-9844-b0253cb4a3b2/bunasixoguweger.pdfIn PDF document text
    • http://fokomigazojifa.epizy.com/how_to_measure_montevideo_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9addddf1-77db-4b69-80bb-ae465c5ec06c/bushnell_game_camera_reviews.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/84750279329.pdfIn PDF document text
    • http://jilerixam.epizy.com/45264603423.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_off00016670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16670 5340 bytes
SHA-256: 53bb7e3640980d974d5b130277a25e50e23540c8df513857b962c010b29e6e81
font_01_sfnt_off0001788e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1788E 11312 bytes
SHA-256: 005a8fbe5591d3f3c246cbb326882302869d639a5c1bee37e5a059dd9145c514

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