Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1a73de4324f922…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 10:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c8c6a403a0fad31c1d295f3c86c0fc SHA-1: 94727bb1ff2e5f583b1906466d691b121ebcabf6 SHA-256: fb1a73de4324f922991c1bca904695a35ba1942d4e22899b2120ca96eb689c43
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'lozipotod.ru' and containing 'memorandum+of+understanding+template+australia' in the query parameters, suggesting a phishing lure. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=memorandum+of+understanding+template+australia
    • https://cdn-cms.f-static.net/uploads/4474977/normal_605821f35ee02.pdf
    • https://cdn.sqhk.co/xonarewu/xjegfjh/life_is_strange_2_ost_into_the_woods.pdf
    • https://cdn.sqhk.co/xumupojamax/jehbLFS/11459736828.pdf
    • http://komaxinatobofe.medianewsonline.com/28875589219.pdf
    • http://volupixo.mygamesonline.org/86332339708.pdf
    • https://cdn.sqhk.co/rovonoset/hAnjcoE/85253716479.pdf
    • https://cdn.sqhk.co/foropogajag/qhgihgh/td_auto_bank_login.pdf
    • https://cdn-cms.f-static.net/uploads/4463300/normal_5fd829c321842.pdf
    • https://cdn-cms.f-static.net/uploads/4376087/normal_60417eec29620.pdf
    • http://xomunuxeju.sportsontheweb.net/how_to_glaze_a_smithfield_spiral_ham.pdf
    • https://cdn-cms.f-static.net/uploads/4484093/normal_602b9da0cc6d5.pdf
    • http://manibupefif.mypressonline.com/xajetonuxod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://89e1056b-8c01-44a4-bea5-a80a497d444f.filesusr.com/ugd/6db6f7_72f587e0ff8648b2b9a2ee16dc0a17b2.pdf?index=true
    • https://s3.amazonaws.com/ginutu/anatomy_mnemonics_muscles.pdf
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_8e277a6fe01c4763a016aa2e78ba448d.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_9105454c4fe147658abac19efba034c8.pdf?index=true
    • https://s3.amazonaws.com/setikizo/xebimupan.pdf
    • https://s3.amazonaws.com/wemazun/the_captive_2014_movie.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2d.bin
2a566eb01177f20a5744e299a3b4ea2ed1f4e3778ac244c1faa7a923c10ee754		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 5248 bytes
font_01_sfnt_off00010cec.bin
af9e4ce3b6f22d14362f9378beb0044f3b16fef1f6a613a5cdb2ad5ae8778ad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 10556 bytes
font_02_sfnt_off00013116.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13116 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.