Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e34b5ee0caec88…

MALICIOUS

PDF

74.6 KB Created: 2021-04-01 10:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4e45394f267b0cbf485db511d857a52 SHA-1: d425a912773e66af66734b3e2060b7ca40861d3e SHA-256: 97e34b5ee0caec88d2279c690892b5f10efc682d2fe04f2c292de77908c9caff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=days+of+the+week+calendar+pdf
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/a9867c8ec5a376.pdf
    • https://cdn.sqhk.co/lafuwexale/iiTifjc/first_skyscraper_in_dubai.pdf
    • https://cdn.sqhk.co/difanemifal/fqAhgji/my_lips_are_sealed_name_meaning.pdf
    • https://zuvoxowiton.weebly.com/uploads/1/3/0/8/130813332/d0d5e1def2760.pdf
    • https://fakozopaximubod.weebly.com/uploads/1/3/1/4/131453484/jekidala_samobalimeki_welolexumub.pdf
    • https://cdn.sqhk.co/kizofapekeku/IP8jbjh/dalotuz.pdf
    • https://cdn.sqhk.co/mizogujuzo/gdij11j/namevaxopenipoberobafakuv.pdf
    • http://mavito.online/8939386084wov1a.pdf
    • http://7evenrp.ru/wubodifxt25.pdf
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/nugokimof.pdf
    • https://cdn.sqhk.co/judawube/j2Qjfig/30739315065.pdf
    • https://cdn.sqhk.co/bogovureg/QvijheZ/home_run_switch_wiring.pdf
    • https://rasetakewalufil.weebly.com/uploads/1/3/6/0/136086978/fivuviterofa_rakuvi_tamubewag_gazinaj.pdf
    • http://support-copyrighthelpservice-about.com/vevasilugupirskxs.pdf
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/fakurimewu.pdf
    • https://cdn.sqhk.co/rolileduvof/yehd3gf/weran.pdf
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/pitike.pdf
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/bixazoput_mituwidepiz_fuzopetenatovar_vanejob.pdf
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/3552605.pdf
    • http://stalekost.site/18551747348f2vwr.pdf
    • https://sinixamaruxibul.weebly.com/uploads/1/3/4/6/134653816/daa35a3d2.pdf
    • http://draiwenstore.online/13299557495zvrfa.pdf
    • https://cdn.sqhk.co/losokifape/eChi0jd/jegumofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e418.bin
db83b7b3540a154205ee3fd1bd3f558cdd4067a63815cb82a29c899233fa5906		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5500 bytes
font_01_sfnt_off0000f6ea.bin
4ab6a0304a37d6448389d0e4f385e8d571634a63b123da143aad67badddac5de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 11208 bytes

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