Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8a31f564863725…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 20:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 439139c37dd25279bddb97291025ed88 SHA-1: 8402701317f6f325e1b179f0f43a34158de971a2 SHA-256: 3e8a31f564863725e680d96dc2138c7e6b0fdcdc78246bc85f2aefb67914f417
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=bluestacks+pc+setup+free PDF link annotation
    • https://cdn.sqhk.co/rapawomo/Bjbilhb/aesthetic_wallpapers_iphone_purple.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/6HtggTD/jagafene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5ff26bbfb4117.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hUhhicY/drift_cup_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601e34f6ee808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_604a96a6286c9.pdfIn PDF document text
    • http://lidozabanej.iblogger.org/32995744416.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5ffac149a5bcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5ffb69c4c85f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_6007cd7562cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_601a211962a1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_12383646d08a49cb8304d207b5e57ca0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakadutof/video_wallpaper_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/youtube_amazing_grace_my_chains_are_gone_pentatonix.pdfIn PDF document text
    • http://folujas.epizy.com/pte_writing_essay_sample_answers.pdfIn PDF document text
    • http://bemijeranokawu.epizy.com/saliwanumisovuxeriwu.pdfIn PDF document text
    • http://zapofekeba.rf.gd/nuxizozarodozekab.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_152ce30b4d6c478380311f7062c6202d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/toro_self_paced_mower_wont_start.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_5b7758188f63465b862b9a23a8adab21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/microsoft_event_ticket_template_free.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_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 5124 bytes
SHA-256: 857945541c25cb1afdd057b537ecea1e7ded00cc0445796030a14b007851a98e
font_01_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 20528 bytes
SHA-256: 2ee88dc74339066e29dff53fd3035aabb6e11b5585078672a51e40996639fcb4

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