Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf0aa483b682998…

MALICIOUS

PDF

83.8 KB Created: 2021-03-19 10:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a6e680f5f64589d79a09a8e4c66b0a81 SHA-1: 471d7e9222ce9ee154c97aa4d63f718ecd3ada7b SHA-256: 8cf0aa483b682998eaad1cf556290ecae7dcf30701e1c7224b048cbd654ea228
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious campaign, potentially using embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=baseball+player+jim+edmonds+net+worth PDF link annotation
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/letonemi.pdfIn PDF document text
    • https://sapezirotup.weebly.com/uploads/1/3/4/5/134576964/davejoragoxo-maxoxo-fakumutufuda-dinudikofigig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_600a1666d71a9.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/jenn_air_stove_top_service.pdfIn PDF document text
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/07ef8e768.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/rewanixuwugofek.pdfIn PDF document text
    • https://joginogi.weebly.com/uploads/1/3/1/1/131163620/5264138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fce9db454c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_600ce6e579dc0.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/logitech_wireless_headset_h600_not_charging.pdfIn PDF document text
    • http://loxiturizule.sportsontheweb.net/15924444137.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/1eae40dc93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420430/normal_5ffdb3cc611c5.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/4331219.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/5443179.pdfIn PDF document text
    • https://nebelifufenav.weebly.com/uploads/1/3/1/4/131437331/8514388.pdfIn PDF document text
    • http://fb-ig-violation.com/rovidamexuvizuribopudosijs2uc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_601339382b32b.pdfIn PDF document text
    • http://scrlt.xyz/21936231502znl7f.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/solve_radical_equations_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fogovulosuzan.onlinewebshop.net/28909799047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333993b7-9a2f-4703-9e65-242a137c6e49/what_is_the_best_tip_to_use_for_frosting_cupcakes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b5403a-f36d-4477-aaf5-a3403f04a237/conair_deluxe_compact_fabric_steamer_instructions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 5448 bytes
SHA-256: e8923adcc2c5b1b5701597ea68ca71d87a74f12aca94084fa9516538fcd13abf
font_01_sfnt_off00010e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1D 10968 bytes
SHA-256: 67ae659590ddc5e9dbc81610e951196be0d794a3daccbe287a492395d781729e
font_02_sfnt_off0001335d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3