Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5256aa6008e39a…

MALICIOUS

PDF

91.1 KB Created: 2021-02-07 07:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5dd22b5121452ac89fbccfa966caa8a7 SHA-1: d068c1b833830fa60f6ab5ab4a6d194bd08ce12c SHA-256: fb5256aa6008e39afa4d7e15773ca77d120bccc514fc32658ba7dc2df249c3ef
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to bus travel, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=bus+philadelphia+to+nyc+boltbus PDF link annotation
    • https://cdn.sqhk.co/laxefotogulo/vL2KidN/jodikop.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/QghGzBJ/xipadejabenafam.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/4crjjk7/rugby_world_cup_2015_xbox_one_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fd99fc1b7ba2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_5fcc0391ac780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5fe4a0658bb34.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/classworks_login_marion_county_alabama8fv20.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/HPaYOhg/46700495627.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/pkjeaBO/54512712994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496014/normal_600826d334921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5fd661a7f4091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fd3247c7b13c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464067/normal_5ff462f22c32d.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/Zgijg2u/mofumipow.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/hcNhagc/christmas_wish_list_2019_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/idjetge/80532902311.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/aOuiamS/soothing_sleep_sounds_free_app.pdfIn PDF document text
    • http://domen3.club/chapin_61900_backpack_sprayer_manualdn4c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6007d473cdc3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 5356 bytes
SHA-256: 5966898ebaf58a6d78d5887cb95042f7db5db1887f56bb4ea230505f4852b100
font_01_sfnt_off000136b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B8 11912 bytes
SHA-256: 2c89a99cce5797e26e7d4cadd06e831b31e4744c377d0dd07fd6e2416c94dc5d

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