Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaa4a73f3e3c47e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-07 01:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 34f6163d7d33b0e5f5854837b118c5a4 SHA-1: 46d0198a28407323b97c2267192aaf99dd454163 SHA-256: ccaa4a73f3e3c47ee125bd77dfe0711db205629197b8b6aaadc894c856f80403
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed for SEO. It contains numerous external URIs, many pointing to disposable hosting, suggesting an attempt to redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a malicious intent to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/wix?keyword=tu+discovery+kids.com%252Fmy+little+pony+votar PDF link annotation
    • https://cdn.sqhk.co/pisapaxosabo/aikiVgg/73332017032.pdfIn PDF document text
    • http://sodahq.club/unit_operations_of_chemical_engineering_7th_edition_free_ebook_downloads4p3u.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/5497496.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/4af1a0c4b64.pdfIn PDF document text
    • https://litapofigiwo.weebly.com/uploads/1/3/5/3/135349015/wibabinawivup.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/fibcEhb/nevubiwiso.pdfIn PDF document text
    • http://okclub.org/11298779095zrvt3.pdfIn PDF document text
    • https://cdn.sqhk.co/zereseful/eOUgcyU/kobozelesadexu.pdfIn PDF document text
    • https://rumuwobega.weebly.com/uploads/1/3/4/3/134353317/sujokofobijeguf_wixigamoto_reditevo_runurevidebod.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/KiiNicB/71674253688.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/cdmkgcL/daily_and_weekly_planner_template_excel.pdfIn PDF document text
    • http://zarabotok.space/aadhar_card_form_in_gujaratihqn1p.pdfIn PDF document text
    • http://nely.xyz/rewabubojawudodfe0bk.pdfIn PDF document text
    • http://ses-paypal.com/iphone_5s_icloud_bypass_tool_freegh933.pdfIn PDF document text
    • https://cdn.sqhk.co/dezosanag/ic5jiji/dream_girlfriend_mod_apk_1._0._31.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/ehjfTYe/learn_lightroom_classic_cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_814660ec8ac7455d8036e93e6122e053.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_30cf911ee15a45a0a8dc1f20392f910d.pdf?index=trueIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_af91641fe3264597afb05d671302df8c.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_91ddbf85cf1b4330b6cdb1c6bbea5617.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_29355f8701b54d51973c4894bd77dade.pdf?index=trueIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_2778876696b74a82a941877a49c2887c.pdf?index=trueIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_9408a79599b748dd9663587c6bb0d82f.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_1060dc349589450d8576ec58e4b0ca08.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_eb73e365f0484bf1afb4a939aa264000.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 3212 bytes
SHA-256: 27b748ee931503da7bbd748c21e6b962001e2b36dc9ea055ea975387d771fc72
font_01_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5460 bytes
SHA-256: 565850b94a66be93e2efea1683f885ac3a579b4767a3103b023c9c1ae1daa479
font_02_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 10276 bytes
SHA-256: 1b364044b48260b5a0a04f2711b3141996a99585708464b2d4d82980392a15bc

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