Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fc098f2e43a6e8…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 15:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a47bf050c09d4bc2af27a13301210b07 SHA-1: d51dcd72b446b1c302e2b66b0281ed29ce03ba62 SHA-256: d2fc098f2e43a6e8a74a2369c77a1e01f74270b9385ba5bcef89114c7e839b84
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains and structured as SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=textar+brake+pads+mercedes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5fc91296bb846.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/HiahaVp/vutakapegeponit.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/59838249921.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/UE7ymgL/85279760410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5fe3c70640516.pdfIn PDF document text
    • http://pay-order.info/2581802529gok2w.pdfIn PDF document text
    • http://subbellassecret.com/navajo_origin_storyqng66.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/xofapixukesizidudulatoluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5ffbcc12e8da3.pdfIn PDF document text
    • http://jopkapopka.online/zanitilokuy39ck.pdfIn PDF document text
    • https://cdn.sqhk.co/tipekafomube/nt53ijX/67432581297.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/xaxigo.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/iiiijhp/anger_of_stick_5_1001_oyun_club_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/gpjiDjj/fashion_empire_dressup_boutique_sim_download.pdfIn PDF document text
    • http://sejujanovemo.medianewsonline.com/formula_del_acido_cloridrico.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/3niPFSd/27608644678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_6000084edb844.pdfIn PDF document text
    • https://cdn.sqhk.co/gobamagedesi/ijgeXic/11953102711.pdfIn PDF document text
    • http://alphabitx.com/61180207023zgb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_c4c1274b46614908b97e967c77bd403b.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_ce2252972ee241d2b3afa828f1510114.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_fa7229ab91ea409b8e1a2913669ef578.pdf?index=trueIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_6ac0248d90d24b38b9bed158160559ac.pdf?index=trueIn 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_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 5408 bytes
SHA-256: c8f77097538f5495b18b61a8798e5625207cb9ddc04aedc107f006f5abe0879e
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 10852 bytes
SHA-256: ce0badc5a82cff7da252955e32e29e0f3e5583f32f276ceab7e0a479a254abcd