Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b99608b447361b1…

MALICIOUS

PDF

88.4 KB Created: 2021-04-22 00:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7df7b9be768eac7fb965d9c7e00a8187 SHA-1: e204bac17bdce61bf4be6854ad58bde21f414515 SHA-256: 9b99608b447361b1747e22db7f638567a9913e4e15d167bd2790e03b05edb6ff
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://zajinet.ru/strik?utm_term=science+of+mind+book PDF link annotation
    • http://leduxebawini.22web.org/fusasasemo.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/bhagavad_gita_slokas_with_meaning_in_kannada.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/a8259.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/geririkikefekiluwu.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/kuvebimonuneb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_603f1883448bf.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/roxorunaloxis-xadadobib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_5fe2e9ac773b4.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/bopagitexugewurinemorodo.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/sipag_revoli_neleziwuji.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/nafakafi.pdfIn PDF document text
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/wepunif.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/how_to_study_physics_for_class_12_isc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5fe56f056de57.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/mudabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5fd3cb0dc2acb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_e34153091a4c40cab8f9faa5beb4fbc5.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_fdb92cea9f4f44b0b91d07a0564300a2.pdf?index=trueIn PDF document text
    • http://wororezijetixa.atwebpages.com/biermann_s_handbook_of_pulp_and_paper.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/zoology_lab_manual_for_plus_two.pdfIn PDF document text
    • http://wexewowi.rf.gd/lojizodonavofa.pdfIn PDF document text
    • http://fetapewifug.epizy.com/dozur.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_676117efca8942c688b4ae127021acb7.pdf?index=trueIn PDF document text
    • https://9b56c271-8e60-4ff0-96d1-8930f8c082f8.filesusr.com/ugd/5a1ab0_ce0ac5683733490baef9f6f002d24c9a.pdf?index=trueIn PDF document text
    • http://sudisededokop.epizy.com/the_other_side_of_the_door_movie_trailer.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_ada61409fc2948708833e12052aa043e.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 2828 bytes
SHA-256: eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4
font_01_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 4960 bytes
SHA-256: 21f22ddbd3aa58058a9b9e2a78755247bb03cc180dc302caaa66bc85104c12c4
font_02_sfnt_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 6020 bytes
SHA-256: 37d0bc69794a5cebe253f99369faa7e49ac9dd9096bcdb3bbcb878da9f2963dd
font_03_sfnt_off00012c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C21 11564 bytes
SHA-256: 5ed1e3a2593951e915e031d67eb9a8186fbc62cb93c8986852f3659edc34bb81

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