Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eeab2a71fe7798…

MALICIOUS

PDF

70.4 KB Created: 2020-12-13 22:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 11b2bbe9d830cb44b3622c227128785a SHA-1: 694802b586c7aa8d4c9cc9341f78277384b2f9ef SHA-256: 34eeab2a71fe779857894b7b0a3f2515d7826f76d594753f12d2bcecb034b509
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many hosted on Weebly, suggesting it is part of a link farm designed to drive traffic to malicious or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The document body, though partially corrupted, contains text related to interview questions, which serves as a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=git+interview+questions+and+answers+for+testers PDF link annotation
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/bituj.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/8288419.pdfIn PDF document text
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/wutilewanagifulokav.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/83c6e272b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/vofux.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/butterfly_effect_free_music.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/zojefurejutuwiwixufusepam.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/75645161892.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/wallpapers_hd_desktop_backgrounds.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/cracked_apk_mods_bluestacks.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 5180 bytes
SHA-256: fdbc6968f0db2a45c82bde6d04327824c2253d5b423b662bbb147b1995d28dbf
font_01_sfnt_off0000ec04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC04 9560 bytes
SHA-256: 4f6df93cb64f7a3c90aab18bded06c86929a0c8be9d250d195651e6bb0346bac