Malicious PDF — malware analysis report

Static analysis result for SHA-256 93267703de355c1a…

MALICIOUS

PDF

83.2 KB Created: 2021-03-10 17:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e5f73ba5bfb9651d3261ce5ea2e9fb88 SHA-1: 9732ebbcc3475770be9a11964c1cec0fbae10afe SHA-256: 93267703de355c1ab81d9a265adeb4c1d4efb42f036ef8f7cc686dddea7d1dc6
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=top+games+for+android+tablet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415950/normal_5ffdb917a6622.pdfIn PDF document text
    • http://tryse.xyz/150480627920cxk1.pdfIn PDF document text
    • http://shopwithsale.website/lasting_power_of_attorney_guide_a1uj66c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_600d0e7c62ce2.pdfIn PDF document text
    • http://proita.space/xatizuwekebiwtbp1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fff102dd6357.pdfIn PDF document text
    • http://paypallsecurity.com/alfa_romeo_giulia_manual_swapx3u75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5fd60b9c914da.pdfIn PDF document text
    • http://fibewoz.22web.org/mivigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_6047198282f21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zatumowezixe.rf.gd/tumimewokufura.pdfIn PDF document text
    • https://7893bdd6-41e4-48f6-9953-3a636dfb5d61.filesusr.com/ugd/c5c63b_db93c4d9ce84465cb77641d1fc5af44e.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_95dafcffb9434207b6773363238007ff.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_4d4db171045c4074bfa9ffa61ad554e5.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_dac0204a0f3540ab8d526b471578b247.pdf?index=trueIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_7d2ebd5e2a19475b84006d8261eea70e.pdf?index=trueIn PDF document text
    • http://visagiza.epizy.com/depobunaxojegiwoji.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_2bfbe50cb48a467181d0a836f9d3fdc7.pdf?index=trueIn PDF document text
    • http://rofixalo.epizy.com/biwugugoxapalebiwuri.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_77a84420c5384965ae0712ad1ee6801f.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_69a5804471074c38ad783a138967a4c1.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_ddca9df1cfac4b24bcde58be7f97dd53.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_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 5452 bytes
SHA-256: 3a3c9ff9a8df0e867c197e466c96dc41924fbf07b113814562be36622a4df6d2
font_01_sfnt_off00011a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 10784 bytes
SHA-256: 47873f370d4caacd4777d8014d408bd3df33f6ab1fa254e6e7959499e3bc1bf6

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