Malicious PDF — malware analysis report

Static analysis result for SHA-256 088c744bc608f560…

MALICIOUS

PDF

76.8 KB Created: 2021-03-12 17:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 7a5a26ab7b2af71faf6b5fdd206c82a5 SHA-1: bfbf9712e3414f9801712a12cf3b5c06ecf1c8d8 SHA-256: 088c744bc608f56001d6d675effbac26d523a79e124dff9a250bed2b3dcd3feb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to drive traffic 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 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.
  • 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=hernia+hiatal+dieta+pdf PDF link annotation
    • http://dizaxabon.iblogger.org/94021280192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_60491c1ea9ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495858/normal_603691884a716.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/jajghj4/stormblades_game_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mizaveteg/icjgjjh/sojefejudogasimuzaduvazan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_600a124b2e212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_602fa66b9bc00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_6ccf6b83174d47709820994498922513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/29765732766.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_to_connect_2_jbl_speakers_together.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/amritsar_chandigarh_movie.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_4567697b990d4254b74689f90d6483a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/ladupalofugurugage.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/e3_spark_plug_for_troy_bilt_tb110.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/mudemitidaleturabo.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/25159615528.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/ignou_admission_form_2019.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_518334a45b234ea59afbdf3dbd076a7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/mdr_zx770bn_battery_level.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_1f751fab25f045ae9dbc67d443cf5418.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_e64528a852b04525ad5d232d2d62ba8f.pdf?index=trueIn 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_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 4912 bytes
SHA-256: dd97bee85f166d5e0133cb14a40c2719af07756b5140df16c32183ada5392c80
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 10064 bytes
SHA-256: 32ff1d6af619df8997e2664b597a856d6220904dfee4b9eccaab0f4055382782

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