Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b74077a10db603…

MALICIOUS

PDF

74.2 KB Created: 2021-01-06 08:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4d1a67ae0c14e68a9cf284f9a8fde3 SHA-1: ecbbd27ae0e4b554a3bcfd9ef45293169c418ba1 SHA-256: 54b74077a10db6034dd28147b5022a79f4e67fcac9b45711a05f2d9196ad9eed
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection scheme. The embedded URL 'https://traffset.ru/aws?utm_term=beautiful+cute+baby+images+hd+free' is likely used to direct users to malicious content.

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-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://traffset.ru/aws?utm_term=beautiful+cute+baby+images+hd+free
    • https://cdn.sqhk.co/lenufetimop/19ibDbc/bodivexafabobivumado.pdf
    • https://fasilusizewolas.weebly.com/uploads/1/3/5/3/135313848/144743.pdf
    • https://namatevugaveri.weebly.com/uploads/1/3/4/3/134350782/2613309.pdf
    • https://cdn-cms.f-static.net/uploads/4467286/normal_5fa58ee2addbb.pdf
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fdda11990c30.pdf
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/9733516.pdf
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/molevijasuxidumedobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1738f5d1-98c5-4713-89d1-d19d14499386/28914805812.pdf
    • https://uploads.strikinglycdn.com/files/1e25dc35-3d5f-4803-9a7a-dcf49d83f21c/baxesifavojalubimar.pdf
    • https://uploads.strikinglycdn.com/files/8915fe87-2565-44cf-9fdd-2ed30b59576e/vetadabuluvuv.pdf
    • https://uploads.strikinglycdn.com/files/33ef6a30-9e51-4c82-948c-11226f1c03f9/79003724120.pdf
    • https://uploads.strikinglycdn.com/files/2024be82-1484-4851-bf68-85aa452310f4/topiveduderedudawigib.pdf
    • https://uploads.strikinglycdn.com/files/f28f5913-d7db-4e0b-a1d7-3cfe810007f4/tukotakisorovepagav.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_off0000e3ea.bin
99e3f68799ba359e3a731e43342a8fcd7680ac9baa04818f6d26fc5d5c90da92
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 5728 bytes
font_01_sfnt_off0000f745.bin
fb8f7cc08e598ec4480f9937dec2ee92408030416a33ce01aebf49e577d9c1f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 11088 bytes