Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a1cc7c7edb7884…

MALICIOUS

PDF

85.7 KB Created: 2021-03-02 02:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed5cabee4de74e7da8245f3df0e2191f SHA-1: ff99a332565539c961269bc0d0b6654667fbbda4 SHA-256: 61a1cc7c7edb7884daa0974df57c337eb5c9130dd4ea66dbbdaa174b7f0282ae
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, suggesting a link farm or SEO manipulation tactic. ClamAV and ML classifiers also flagged the file as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external URLs, including those on disposable hosting, indicates a potential distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=sig+sauer+p229+vs+glock+19+reliability PDF link annotation
    • https://cdn.sqhk.co/jarutejip/aDhaia4/favoli.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/how_long_is_too_long_to_wait_for_stitches.pdfIn PDF document text
    • https://cdn.sqhk.co/tosaporafoxa/ajbhijj/guwuzekowilukepuju.pdfIn PDF document text
    • http://yoptan.space/gapepaxamijidsws6y.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/ijhfgjh/51462164174.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/99547740717.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/aihoiiT/planet_fitness_cancel_membership_no_commitment.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/5be5f9d98.pdfIn PDF document text
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/feluwasaxikoz.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/rowuwuvuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/agejiih/laxaxemulep.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/cOheYdv/rodewi.pdfIn PDF document text
    • https://melajepanaxon.weebly.com/uploads/1/3/5/3/135398769/40f83.pdfIn PDF document text
    • http://dorightunion.com/kukalimokukowoekmu7.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/44616642177.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jfb5ngg/parentsquare_app_store.pdfIn PDF document text
    • http://slmit.fun/iphone_6s_matrix_live_wallpaper_videos2tbk.pdfIn PDF document text
    • http://creamwalls.space/coach_jes_crossbody_star_quiltingqh41g.pdfIn PDF document text
    • https://vanewuzopawibo.weebly.com/uploads/1/3/0/8/130814706/pemigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 5912 bytes
SHA-256: fac7f6749fc3de88404bb2257501f667f5168813cdb193a69d5a1824cb34efb8
font_01_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 10612 bytes
SHA-256: 2a436da531681d2e9619c111940fbe5154c78f84740c7e80308aa000d4cf2bf4

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