Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae2bc8668f2b3d4…

MALICIOUS

PDF

69.9 KB Created: 2020-12-15 21:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9713bc3cde5d325b80743acc12e65cd1 SHA-1: 18d657ece91d9586d1a11abd1b417f2535fdcade SHA-256: 9ae2bc8668f2b3d4d3f7a4b61f8d0f6a13838d5183a99f15fb786ea6138f4181
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://trafffi.ru/strik?utm_term=xbox+360+cyber+monday+2015', appears to be a lure, potentially related to a phishing or scam campaign. No scripts were extracted, but the presence of numerous external links points towards a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=xbox+360+cyber+monday+2015
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/399cd50d9fcbd3d.pdf
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5fad9d7367e64.pdf
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8c39e199403.pdf
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5fcc2e6decc28.pdf
    • https://tikofasej.weebly.com/uploads/1/3/4/6/134615027/3568848.pdf
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/gufel.pdf
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/0d27c0f21f710e.pdf
    • https://jikisotawojagug.weebly.com/uploads/1/3/4/3/134393354/9ae215efc54cd55.pdf
    • https://tonirifiw.weebly.com/uploads/1/3/4/4/134468227/1267998.pdf
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5fb3773de9477.pdf
    • https://cdn-cms.f-static.net/uploads/4450037/normal_5faa39ec011f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc1ae857d0c8f249d464d7c/t/5fc3baaf3c02f22b9d7ee604/1606662832485/gerigikarepilutumeliwo.pdf
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc2d01e145a8629dc0dd88a/1606602782994/fallout_3_shishkebab_schematics.pdf
    • https://static1.squarespace.com/static/5fc166e5ab79f442f22d24ec/t/5fca028381b71b40859b2eac/1607074436900/best_ninja_warrior_shoes.pdf
    • https://s3.amazonaws.com/simujix/51607209405.pdf
    • https://static1.squarespace.com/static/5fce7f599c282a530799846c/t/5fd632d2226e9048fab0253d/1607873245669/chalte_chalte_pakeezah_video_song.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/potty_racers_2_game.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_off0000d1bc.bin
a684b742ad399a89acfa34fb75ec2fc4186a4aa95b9f739c3d1c216778f414f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BC 5932 bytes
font_01_sfnt_off0000e5e0.bin
65a7a54696b30e1707c4a9cd122f57273099a55cc4814c0240e36ec4aa63b1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 10776 bytes

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