Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6094539489f652f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-25 14:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2ea463936f94a19ff40d76e9811d78c SHA-1: 66f1e77b65ca5a719667cb227044905b5c34e837 SHA-256: c6094539489f652f1a59d262eaf7e75c8e7b7c3c4785dac6c328f2d32ab39f9c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wix?keyword=star+citizen+player+guide
    • https://xabomitutopimo.weebly.com/uploads/1/3/5/9/135961599/3930968.pdf
    • http://boriroxoxejava.mypressonline.com/advanced_ecg_boards_and_beyond_free_download.pdf
    • https://bidegibi.weebly.com/uploads/1/3/4/4/134476665/fea8f6e9.pdf
    • http://gagogepatajebe.medianewsonline.com/antibiotic_prophylaxis_and_recurrent_urinary_tract_infection_in_children.pdf
    • https://cdn-cms.f-static.net/uploads/4465930/normal_604b31f290fa8.pdf
    • http://itactical.xyz/bupibiwobijewazuzow1w95z.pdf
    • http://trujillostacoshop.com/e_myth_contractor6tgz5.pdf
    • https://cdn-cms.f-static.net/uploads/4456712/normal_605afc1300f71.pdf
    • http://doordash.link/kokogorigawoxogasipe2xux.pdf
    • http://lnstgramhelpcopyright.com/first_alert_carbon_monoxide_alarm_beeping_every_minutegxenw.pdf
    • http://lumobumekola.getenjoyment.net/2013_subaru_impreza_wrx_engine_name.pdf
    • http://napodosawukezob.getenjoyment.net/nusisewivipokok.pdf
    • https://cdn-cms.f-static.net/uploads/4411714/normal_604362f73d6a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/04180eda-38e9-44b1-88a0-df456a025aa9/94615087643.pdf
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_2ded41bd335741eb8e57d3af864e1fc5.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_d4cea0b0a15342c49b2cbfee2ffa62e4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90e9c6d8-b445-439c-b494-71d0fbab2827/rin_tin_tin_dog_movie.pdf
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_ecced86a17304c07a574162d01098afc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4e3b7217-527c-49fa-96f2-fc8094efd677/what_are_the_5_different_types_of_textiles.pdf
    • https://uploads.strikinglycdn.com/files/c6f56a36-14c9-40cd-be6f-e660418cc756/58878241693.pdf
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_a1c1715abd524a659f917fc5e0cec5ca.pdf?index=true
    • http://naxepedawizozet.onlinewebshop.net/jowagutonoserubovoto.pdf
    • https://uploads.strikinglycdn.com/files/c6260f46-95b6-4b90-8afa-d938b9e74aee/suvenofekide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac9.bin
d7e7f13672719f68400004406c134a22ec90e2226c9c74bedb7136d301e12ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 5316 bytes
font_01_sfnt_off0000fcfe.bin
65f29694531f28dc5dc5e8e84b092ebfbae85279b46061eb3e47a3d67c082b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 11160 bytes

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