Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b84c9eda195cdf6…

MALICIOUS

PDF

80.3 KB Created: 2021-04-02 17:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: de7b19bbb8506795aa55d885474e4036 SHA-1: db95e8d080a977eddf23598f4f7045313c789872 SHA-256: 1b84c9eda195cdf6ddae235ea5986cf7b08d0c136a88c958f92558a06d4210e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs that redirect to external sites, likely as part of a phishing campaign. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to a fake resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/award?keyword=calisthenics+bodybuilding+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482869/normal_603b2c7427bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_6010fd5eb7fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_601456ef123f7.pdfIn PDF document text
    • http://mebosopevux.iblogger.org/fccla_planning_process_template_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/jbYgctF/christmas_run_park_trails.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/lkibsxU/silicon_valley_season_6_review.pdfIn PDF document text
    • http://tapikival.22web.org/21097765509.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/lokojoridus.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/52162ce7c8d1513.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/1gjthhZ/vuvikumelaxakukebixipajef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojovosis.rf.gd/82078799476.pdfIn PDF document text
    • http://setiwifuv.rf.gd/san_francisco_bay_area_map.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/58570739745.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_004baf8da2fe4504ad3ea02cb9021cbf.pdf?index=trueIn PDF document text
    • http://refiwaremep.epizy.com/kizapewuzixinobela.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_579a59fd181e41a0947e12c31340397e.pdf?index=trueIn PDF document text
    • http://zufonokimilije.epizy.com/xobum.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_037504f5e76e4b138aea73dc6b41738c.pdf?index=trueIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_ab96d37c5f404e23857ef0274e24b153.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_9399ba4d76e045c981812464903e0747.pdf?index=trueIn PDF document text
    • http://tewarenibimek.rf.gd/nexans_amercable.pdfIn PDF document text
    • http://norilonabu.epizy.com/how_to_add_disney_plus_to_samsung_blu_ray_player.pdfIn 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_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5468 bytes
SHA-256: 08c306e2e3e36b4d7204ac82bbc0548ce2a8ae367fb106db11bf00f274e158dd
font_01_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 10336 bytes
SHA-256: c99023bff781247c1bfa9a2e1d06c8c34f1a865a41c864b8d2c0ded579c78872

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