Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a574ecf34a3da7a…

MALICIOUS

PDF

80.8 KB Created: 2021-04-01 05:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aeb50f7cf092207b9dcd8da6065ac336 SHA-1: 190beb161c56104a04eb7c7b07feaf196357de6e SHA-256: 5a574ecf34a3da7a15647589958d1a57292fbd939d8a6275fe1d0f3ba04016ab
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=tarzan+movie+songs+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5fde83037469b.pdfIn PDF document text
    • http://sodaapp.pro/amar_akbar_anthony_video_songs_teluguvy96u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_5fe932b8e3154.pdfIn PDF document text
    • http://biomanix.best/metusoz43w63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_6046737e797fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_6052a4486fb54.pdfIn PDF document text
    • http://insuranceautousa.com/what_does_crows_symbolizenurkq.pdfIn PDF document text
    • http://reweder.site/fekititogavadulemisasitooaj.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/fuxugukemeturamipifizftp8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fcf769598f26.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/466717343252rvmn.pdfIn PDF document text
    • http://qrettalq.online/juwumagemusilufirugopsxdrq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/citroen_c3_2011_owners_manual.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_dc621b8fe26040f5b4dc095e35273dbf.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_4ccc7914a6ee4501a0761c1115f813bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/97854534395.pdfIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_2936f18950dc4ac6b217e0f3a9d12035.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd6de89-67bd-4b15-9723-a05f8801a925/final_cut_pro_tutorials_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5843ab-90a1-4eba-82f6-a3f014cc2bc4/97329819645.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_fb66ccd3f61445ef80c7558f0ca933f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cf5118-22e7-467f-b3e3-8446c24e75e5/vekazavawogejevivebaboso.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_2b6c24c4c5b7441c9eed64653429cdf2.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_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 5376 bytes
SHA-256: ab68714e95a6a3473989a8307757dba9969bbd4016f2d1f22daeaee906f5b3ff
font_01_sfnt_off000110e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 10856 bytes
SHA-256: ad11d95024cf9ba1a95b80765eb912e1c9ed76a1c0fca4c09882177cd7bbcb5e

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