Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afad06965ffc6f5…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 11:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0f65e309a6eddd86f24e97c85e03399c SHA-1: 43cb9fc44552e8d31a12fe478c72162552503a62 SHA-256: 8afad06965ffc6f544b4732421f25a43a166b20230341a6cfd477ab95b66d418
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/award?keyword=avenged+sevenfold+hail+to+the+king+tab+pdf PDF link annotation
    • http://japamawosoj.mygamesonline.org/franchise_restaurant_business_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jhjy0lj/mogukukuzesegimami.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/rinalivelat.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/Ygeel8b/bojovedebebisijas.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/wumosudabatewerug.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/70836830339.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/a_pair_of_tickets_amy_tan_story.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/h06iigi/37730609281.pdfIn PDF document text
    • http://rebelliona.online/36059817345uf40l.pdfIn PDF document text
    • https://cdn.sqhk.co/xugufufifo/gdzAc9Y/kasagugolikejusosoju.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/bwHVDPi/robotics_notes_anime_watch.pdfIn PDF document text
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/deweraf.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/iQbifjc/82472869890.pdfIn PDF document text
    • http://getsol.xyz/chronic_kidney_disease_treatment_guidelines_20179sma3.pdfIn PDF document text
    • http://roskycnmx.com/zerusutobabadujubip84tfv.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumabigige/haujhgj/atomas_game_tips.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/jijevedogarezelejik.pdfIn PDF document text
    • http://netewe8.xyz/fantasia_sevillana_turinaoypro.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/bhagavad_gita_in_tamil_free_download.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/minaxigevani/saratanuxoku.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/is_it_good_to_mow_lawn_without_catcher.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_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 5460 bytes
SHA-256: f7b96621f211be32d4b808d2b0d70fe5073a128a2b0663bc3ef73147f19e08db
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 10528 bytes
SHA-256: a4ea93b2db5ab50db64b70e896c22359e23b8b71b212bd5ce40d0e57956a3184

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