Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcba4d25deeeb2d…

MALICIOUS

PDF

82.4 KB Created: 2021-03-21 04:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bc43417cac48df93c78b423c07ebdca SHA-1: 9f0bc51097c84f4ab01f8bfea011ddc8eb4fde0b SHA-256: 8fcba4d25deeeb2d031ac03caf37944d52c5a71103cd9d8918c69ae2ea970737
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 PDF link farm, suggesting a phishing or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the link farm indicate a likely attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://dafemum.ru/123?utm_term=kingdoms+of+camelot+guide
    • https://cdn.sqhk.co/fowizolomam/eiegjjf/chocolate_cake_recipe_simple_taste.pdf
    • https://cdn.sqhk.co/sovanoniwuva/zjcngih/racer_classic_car_wash_san_antonio_tx.pdf
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/a7db2b5cff8de.pdf
    • https://cdn.sqhk.co/totarujined/pRHbZGV/reference_contact_sheet_sample.pdf
    • https://cdn.sqhk.co/liwijodi/f1zcQja/66633875480.pdf
    • https://tedudizoz.weebly.com/uploads/1/3/2/6/132683188/kawiwumopujitu-tijite-gibunetuzofasum.pdf
    • http://wilitubejibo.iblogger.org/serials_of_sab_tv.pdf
    • https://cdn.sqhk.co/luxixumogez/QDxhbP2/86860003281.pdf
    • https://molawakipo.weebly.com/uploads/1/3/1/3/131379716/8253988.pdf
    • https://cdn.sqhk.co/febowozefu/hjhdiab/perfect_world_mobile_apk_ios.pdf
    • https://bokepamukabina.weebly.com/uploads/1/3/5/2/135293240/weget-lovizixerogol.pdf
    • https://bifotuvimutojuz.weebly.com/uploads/1/3/0/9/130969437/8041193.pdf
    • https://cdn.sqhk.co/xudevekelefe/PxfeifD/picsart_hack_apk_android.pdf
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/begotoli.pdf
    • https://cdn.sqhk.co/luwivimexu/iijFji8/xinamo.pdf
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/lifezuxedijon.pdf
    • https://cdn.sqhk.co/tamupoto/iahaTif/castle_crashers_2._8.pdf
    • https://cdn.sqhk.co/darojopul/ogXhgdk/panic_button_on_car_keys.pdf
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/5fcb80c6a8e.pdf
    • https://cdn.sqhk.co/fazejitev/gjiixYX/94361585614.pdf
    • https://cdn.sqhk.co/tajiwikiter/jfiadvY/youtube_studio_combine_videos.pdf
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/9242089.pdf
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/kukazifodaxutupijop.pdf
    • https://cdn.sqhk.co/tebefaravuz/jj0xhgd/53754967388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pufupivati.epizy.com/gegiwaxapebevibapon.pdf
    • http://bosefijov.epizy.com/c_diff_acg_guidelines.pdf
    • http://nurojujejabilu.rf.gd/71998223334.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_off00010392.bin
fe799075be394f373b92ed2d3cb433c75904603ccfeaf34b5756e3fe30860c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 5216 bytes
font_01_sfnt_off0001154d.bin
a6f6266067a907807160aa04a8b6a48d6a685b0934ceef8c2085f0344aa61563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 10960 bytes

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