Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84444c292373863…

MALICIOUS

PDF

114.6 KB Created: 2021-03-02 14:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 38923d6213d656b20eba6b6346d9edb1 SHA-1: d087d50045f1867e4b0d0650505fb1ab622d5b35 SHA-256: e84444c292373863510b260317714fe13ccf821d938ce44fe68cebc308e9c6ee
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically pointing to a suspicious domain related to product search terms, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing or malware delivery technique.

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://resalured.ru/award?keyword=philips+series+7000+beard+trimmer+replacement+heads PDF link annotation
    • https://cdn.sqhk.co/pijavagoke/qZH2hft/vuwerinanoreribesizan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451369/normal_5ff794f44833b.pdfIn PDF document text
    • http://degujub.iblogger.org/vidmate_apk_for_apkpure.pdfIn PDF document text
    • http://muslims.net/poe_elementalist_build_3._12jiigx.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/199548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_6010c95da0c09.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/jfgdgd1/68509167815.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/3177555.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/e24513.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/7jdYhc7/red_lobster_hours_for_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_601a714b56398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_60014cd5d76c9.pdfIn PDF document text
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/koken.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimuwogiwofu.rf.gd/59752988557.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/77360980920.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/shark_navigator_vacuum_tools.pdfIn PDF document text
    • http://fotiworoz.epizy.com/55804885098.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/82903167500.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_off00018495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18495 5676 bytes
SHA-256: 7c6dc3175ad5d005fa0fd1742bce5f83df467cde3fb64d25578897516bf50459
font_01_sfnt_off000197b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B4 11016 bytes
SHA-256: edb6f8038fdfeceacfd70f6695a4e7f089ca985c2cff2a4fb3fc6a43c7d76a10

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