Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfdf73309e19e90…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 20:38:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5ca92b4bedf24efb0ff9efc2cd309a80 SHA-1: 5559c6b655ad65be639f03114ade70111218588c SHA-256: 3bfdf73309e19e90317590aa13919e2dad69bb5123db14ebc245a5beac316f28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://dafemum.ru/wix?keyword=beautiful+good+morning+images+with+quotes PDF link annotation
    • http://shop-profildoors.ru/cant_download_gimp_on_macjad0f.pdfIn PDF document text
    • http://lakenamazaga.iblogger.org/best_free_hip_hop_drum_samples.pdfIn PDF document text
    • http://lakshmi-store.ru/dichotomous_key_fish_lab_answers7ncl5.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/55018730202ytfv1.pdfIn PDF document text
    • http://vsedlyatebya.xyz/15812731889c6hyl.pdfIn PDF document text
    • http://zosoxefu.22web.org/yardman_mower_deck_belt.pdfIn PDF document text
    • http://dostafood.xyz/my_hero_academia_season_1_dubdf8kt.pdfIn PDF document text
    • http://wide-do.top/mufokivp2ew2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474997/normal_5febd44b2af11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_601f3276b4b84.pdfIn PDF document text
    • http://tegokujili.iblogger.org/dezazazakozatidazuxejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_60116c7b95ba7.pdfIn PDF document text
    • http://tesocoin.online/popenef5xcfw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujopafupo.epizy.com/61778296408.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_afd1d86d00444ef9b499134b385417e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wopari/chrome_video_on_page.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_2c0beb5c38f6453ab58545b1a11a48fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/42293487079.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_to_learn_microsoft_office_excel_2013.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_65c709a991354c85b65e914ae06c8fb3.pdf?index=trueIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_3a0f11de75af45dda591702c86cc3aca.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5588 bytes
SHA-256: 86c7399a1fc486c4f8934f78940a605f8dd22eb284e0e8e9b7d856b58670aaa5
font_01_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 2452 bytes
SHA-256: b29a34fcdcad0b4a432b08caeffbcc8b2de5d64b9719d90954cea3156eacba23
font_02_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10844 bytes
SHA-256: 90ec61fcfc3fce505744493256fc96ca5ba67a902ffe99a13a9c0e8c8427bd33
font_03_sfnt_off00012859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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