Malicious PDF — malware analysis report

Static analysis result for SHA-256 568aed7f8767abe1…

MALICIOUS

PDF

100.2 KB Created: 2021-03-01 20:37:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4bf2ced23c0362fe596aed3f29af414d SHA-1: 567d3bf2c51fc73a185114c913baec26c5643a24 SHA-256: 568aed7f8767abe105f445160ed3fcebcfc8068647b8354e3e3465f1b3c001d0
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Rolm phone manual', which is likely a pretext to direct users to malicious domains. The presence of numerous external URIs and link farm heuristics indicates a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=rolm+phone+manual PDF link annotation
    • http://tryse.xyz/medical_applications_of_lasergvycn.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/H1gihjj/724452377.pdfIn PDF document text
    • http://xrootunited.com/aureus_primary_school_uniformf3ith.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/beO6jaH/la_legende_final_fantasy_xii_ivalice.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/bgeieri/82242459608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_603837e3d614d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_603c30317c968.pdfIn PDF document text
    • http://rocketdocs.us/xilagalekotujofamavy1k7.pdfIn PDF document text
    • http://steblin.pro/652560678423gyl8.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gnOsjby/sound_assistant_jobs_brisbane.pdfIn PDF document text
    • http://appeal-ig.com/647325664413ft7c.pdfIn PDF document text
    • http://litamomun.22web.org/zejimasebadawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuferopo.epizy.com/zavosovirogone.pdfIn PDF document text
    • http://repatigidan.rf.gd/7068652470.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/takeuchi_tl12v2_parts_manual.pdfIn PDF document text
    • http://mopafanimuwez.epizy.com/online_form_for_marriage_certificate_in_mumbai.pdfIn PDF document text
    • http://neluwomarar.epizy.com/kupamubunisofixuwotowo.pdfIn PDF document text
    • http://daraxojizusavu.epizy.com/gaburuxaxef.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_off00014f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F76 4792 bytes
SHA-256: 0555e4e474e155619a7ce7f77a72e898ee8600583b6227fe7c20660bd9734c03
font_01_sfnt_off00015f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9E 10568 bytes
SHA-256: 9bb3ea2779aab72cc41292b5a7d2ed73db517fbb03791ce50b4162fb0a7354bb

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