Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2694d4daf016e47…

MALICIOUS

PDF

70.1 KB Created: 2021-04-06 18:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 625b7b37b73ff602fb94e42f003f4996 SHA-1: 32a89eb7e41bf41ecb2de04ac2a9f9e2f2327aef SHA-256: c2694d4daf016e47dcb8fce62c3a427045d5f16a9bf18b9c68f664407aa875bc
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 0.9997

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://xajibur.ru/wix?keyword=dish+dvr+512+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476766/normal_5fcbcea710b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_603074fc5a3d0.pdfIn PDF document text
    • http://fonevanezonufo.iblogger.org/nojemavitejefur.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/thematic_apperception_test_murray.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/UriHw7c/weren.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/86797883069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fe514fb17f1d.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/gf3m3eC/32699772696.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/41822890538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_600b7924d7670.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/hhjaGYA/vigebadujuvuboku.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/technique_de_rapprochement_bancaire.pdfIn PDF document text
    • http://axecheat8.xyz/50792456190ckkje.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/mjhc4vP/siminuralazudidizadi.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/ditekorufuzub.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/igicier/63430458063.pdfIn PDF document text
    • http://uscreditreport2021.info/gulamujimawg6ygm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulozeraxepe.epizy.com/tunudelefokit.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/how_to_watch_defending_jacob_without_apple_tv.pdfIn PDF document text
    • http://sogakusepululir.epizy.com/free_website_templates_car_sales.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/animoto_video_app.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_off0000d4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DA 5432 bytes
SHA-256: d3012ee1d1166fa05e482310b8b17dc95c4c53c3ef14003f67d7f23e0a1c9e4c
font_01_sfnt_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 10924 bytes
SHA-256: ed751c5d7b3887a839011341fb8bd82e4401dc1b7f341b02c41c65ac0d300522

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