Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f005c6542c90c8…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 02:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d8401a122824141019ff33eb4dac5381 SHA-1: 28f2a6912085dccaaca3ab560ea7326befa7967f SHA-256: a3f005c6542c90c8c421bdc29b8e5d0e2fcdffe66dfb081befcf7778fb071e3c
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it's part of a link farm designed to redirect users to potentially harmful content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners. No scripts were extracted, but the presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/wix?keyword=hack+game+apkpure PDF link annotation
    • https://cdn.sqhk.co/nuvuvidova/cavzjhP/21779447645.pdfIn PDF document text
    • https://cdn.sqhk.co/zibumimuw/ehg2ij0/sample_of_formal_email_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/EXhbHjd/alienware_desktop_best_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/iibl1ij/movies_near_me_cinemark_20.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/lerezazo/clark_forklift_dealer_ontario.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_f57ffe25e011484bbdf5d905277ca801.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e6994d-e237-45b3-bad5-8a6afb95b4a7/bobcat_s650_service_manual.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_89f7a865b5394e3eaaf48eaaebc77559.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_2aa61e989c0849dbbf63e0bf5494b88d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/ei_telephone_reporting_service_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a729e6-e8f2-46d5-a2e7-cc0cb906f8e8/9980549903.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_ca9880c462534407b5192c90cfab3089.pdf?index=trueIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_03ccb177cdb249609b2a4c62c4ade652.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c11c04e-f48f-40fa-99f8-dc4d858fdd71/99269151395.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/latug.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_edb7026d79fc45b8bef6cb1f4b8093bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09dd910b-6fd1-4d2b-a8be-d9c5d2f17bd1/44160049657.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/konanarugomoxamutaruwulu.pdfIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_5fba035b726f4f80ab43f8a97ed1d95b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f4421b-35f6-4304-9695-def608fc89f0/como_consertar_um_fone_de_ouvido_da_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/62486704679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe6f71e-e7fa-4f51-bb3b-cc27b356d085/lofovekopaxefufotuzad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b44b102-123c-4aee-910d-4344fc6a7120/netflix_the_crown_season_5_how_many_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecee153e-d517-4909-803d-f31be7d6bf74/46722382062.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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 5068 bytes
SHA-256: e791c575b4564c1783b2793a00291235196f1bb55a5a99526e342c5a537eca5e
font_01_sfnt_off0000ff58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 10696 bytes
SHA-256: 50391f8a2b11a06bb48b7d9534d4550e2a604ce3b83ef11f3b06704d08cf4481

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