Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bb447b0afc6fad…

MALICIOUS

PDF

93.0 KB Created: 2021-03-17 17:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1739ecca923ab61606159acfca45e9ab SHA-1: d0ea1f2313e0219b1f78ee4f613e86fce3733c16 SHA-256: 02bb447b0afc6fad4a4a1e04bc42b2b10592c3deeb6f3fce6f789accf82af648
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm, which is a common technique for distributing malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=inherent+vice+pdf
    • http://indir-kazan.com/21235050394iw9p9.pdf
    • https://bibevugu.weebly.com/uploads/1/3/1/4/131406802/8136916.pdf
    • https://jonexizuli.weebly.com/uploads/1/3/4/2/134235370/e39a0418.pdf
    • http://trafikcezaodebayisi.com/how_to_pass_ged_social_studies_test_2018wdnw6.pdf
    • https://cdn.sqhk.co/guzamuvi/hb24Aib/legikizifamezonuxemi.pdf
    • https://cdn.sqhk.co/fekigimuzib/eysop0c/54675444572.pdf
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/nepareromogoju.pdf
    • https://cdn.sqhk.co/liwifetil/eULR7xE/23984549511.pdf
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/9254262.pdf
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/vizugematuxe_jazok_xapazumum_zosejit.pdf
    • https://cdn.sqhk.co/lebogomatoze/l9zU1ia/2048x1152_youtube_template.pdf
    • https://cdn.sqhk.co/lufelumad/kWbyLhc/96619705143.pdf
    • https://cdn.sqhk.co/gizoxemovefi/uMFhihd/36932120789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_25e46a6d1b1448a09964b810850f2574.pdf?index=true
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_d3f6f5f7b4c44e0e811048134697b63e.pdf?index=true
    • https://s3.amazonaws.com/zepifudoxapo/gigewux.pdf
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_fce0cbfa2c464307abd862c753d335a6.pdf?index=true
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_c5d6ac66bfcd4778be11a0ad60ace683.pdf?index=true
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_d25e2919e66046e7a034a20269b6422c.pdf?index=true
    • https://s3.amazonaws.com/wanasuvedigo/julian_date_2021_printable.pdf
    • https://s3.amazonaws.com/suximawo/galvanised_steel_sheet_8x4.pdf
    • https://s3.amazonaws.com/pibajuwi/nutritional_information_for_15_bean_soup.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_off00012948.bin
f22bda8985d3339587ddbcdf8d179420c280f5b9a4da485930b73c302f82638b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12948 4820 bytes
font_01_sfnt_off000139b5.bin
a2f864499162999ad915b7489be77525d739bb88e1c561c4db72bea446db741e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139B5 13664 bytes

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