Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e219f1a27eb6026…

MALICIOUS

PDF

83.0 KB Created: 2021-06-03 12:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 818771cc752497f303511b7095e41318 SHA-1: 0cfc8c303d6ce5e1847ee09c25c4ce7622f1e9e9 SHA-256: 4e219f1a27eb602697a529575abfdb83129b6088baea5eb9838d7f7180a401b2
126 Risk Score

Malware Insights

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

This PDF file is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'resalured.ru'. The document body, though partially garbled, suggests a lure related to a 'Latex document template report', likely intended to trick users into visiting the malicious link. No scripts were extracted, but the PDF structure and URL heuristics strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/123?utm_term=latex+document+template+report PDF link annotation
    • https://gebuzikiko.weebly.com/uploads/1/3/5/4/135400935/00c0b3adf890.pdfIn PDF document text
    • https://givosusomab.weebly.com/uploads/1/3/5/3/135349573/8893919.pdfIn PDF document text
    • https://fubafutevulaz.weebly.com/uploads/1/3/1/8/131856433/1d4536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_601d3afb0ce1d.pdfIn PDF document text
    • https://duzaguzu.weebly.com/uploads/1/3/1/4/131406181/genemigavibutej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_606a8a4eddda0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fe590826f650.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://tiduxikuve.pbworks.com/w/file/fetch/144421752/malagevaxiforivifozozix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79033401-3901-42e3-9dca-4ab58f9b816a/jixikokafiraravotul.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144509217/18295404923.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/f/unblocked_games_66_fireboy_and_watergirl_ice_temple.pdfIn PDF document text
    • http://fevosezew.pbworks.com/w/file/fetch/144439338/fowibujisutowegon.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144440994/31993319851.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/59397751878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6d60a9-d009-4367-99ed-6506690bc1c8/kekud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51874b66-5163-4076-9180-29a2c50bf2e6/vikemaloxaranuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8606eca0-0b8f-4fb4-a593-992a09d87d8e/82846444457.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144541383/84809814788.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_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 4884 bytes
SHA-256: 89a8ed89c0f509575458b42eb38f5e4b264fd1c83d86836722a431d16633e9a8
font_01_sfnt_off0001085c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085C 12204 bytes
SHA-256: 4b662f4bc149ff8fdcc5c2cfc50bd0062ba1553083411b07cc8a680865c16d44
font_02_sfnt_off0001306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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