Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0876f8bda58338…

MALICIOUS

PDF

83.8 KB Created: 2021-03-15 06:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cadee556d7037e8279b91e8542ef3b8e SHA-1: 55669a40fa96886f438e8dad4a25faeaf47785b9 SHA-256: 6e0876f8bda58338ae21fda4270938084e670a15b5ccca7f7a98588c08e65504
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One such link, 'https://ponafet.ru/123?utm_term=baked+chicken+sheet+pan+dinner', is directly embedded and suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=baked+chicken+sheet+pan+dinner
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5fef633ab645a.pdf
    • https://rawevulol.weebly.com/uploads/1/3/5/3/135325706/muzizeruva-sasinazovot-xutisizosites-fitizevuw.pdf
    • https://cdn-cms.f-static.net/uploads/4370303/normal_6038e573aea89.pdf
    • https://static.s123-cdn-static.com/uploads/4486053/normal_6005d27aa514f.pdf
    • https://sebipujo.weebly.com/uploads/1/3/5/2/135294987/gukedadugogevanig.pdf
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5ff85295be563.pdf
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fd1c1e177840.pdf
    • https://xokewetabido.weebly.com/uploads/1/3/1/8/131857041/206737.pdf
    • https://cdn.sqhk.co/sazipuvaxiv/1mhAibo/29395822567.pdf
    • https://cdn.sqhk.co/zoluwumenad/jhnicgj/la_pro_concealer_shade_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4480581/normal_604ed7b98ead4.pdf
    • https://static.s123-cdn-static.com/uploads/4427785/normal_5fcb02287e150.pdf
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60479acd7b85d.pdf
    • https://cdn-cms.f-static.net/uploads/4486037/normal_600e92513bc2c.pdf
    • https://jibozugapizame.weebly.com/uploads/1/3/0/7/130775201/f1e9fb1.pdf
    • https://cdn.sqhk.co/butuxolevu/hhFjiVj/wifixak.pdf
    • https://cdn.sqhk.co/wevujawej/hmojffA/aruba_2930f_24g_4sfp_datasheet.pdf
    • https://cdn.sqhk.co/bojojiweg/hajiyji/40102820951.pdf
    • https://static.s123-cdn-static.com/uploads/4420036/normal_5fde64fe341f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/setikizo/lomuk.pdf
    • https://s3.amazonaws.com/zamemigojat/naseguf.pdf
    • https://s3.amazonaws.com/lunojol/vakigowunokuwufufivivin.pdf
    • https://s3.amazonaws.com/fapaga/how_to_become_an_interior_designer_in_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb59.bin
a140cfc74739d6525b9b1df53b1e8a1f66389e046d3433e48fdbba60ed651eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 4920 bytes
font_01_sfnt_off00010bf2.bin
f8a42450b5f34fdec1811c357656fa9a39fc1cc7b6ab47cba7dc73c91dc95b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF2 11152 bytes
font_02_sfnt_off00013195.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 4324 bytes

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