Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6b8982f3a29e44…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 00:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c1ad23af1bdd0e3b829aa1e75d934920 SHA-1: d0c9680a3361d8f464a663eb10c16bfc1aa23276 SHA-256: 2e6b8982f3a29e447f7134da2d485720aba9c51590cfa3343f4aa91966b33767
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal it contains a large number of external links, characteristic of a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to 'attachment style inventory pdf' and metadata from wkhtmltopdf, suggesting it's a crafted document designed to appear legitimate while directing users to malicious URLs like https://resalured.ru/award?keyword=attachment+style+inventory+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/award?keyword=attachment+style+inventory+pdf PDF link annotation
    • http://idealicaitalia-official.site/52701686328jvelo.pdfIn PDF document text
    • http://copyrights-notices-helps.com/wutavojilutufodiuld8p.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/plato_timaeus_summary_sparknotesttyy1.pdfIn PDF document text
    • http://predouche.xyz/nancy_drew_and_the_hidden_staircase_2019_full_movie_onlinenoccd.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/junie_b_jones_and_the_stupid_smelly_bus_genre4j4rb.pdfIn PDF document text
    • http://shoop-fe.ru/mathe_binomische_formeln_einfach_erklrt84ath.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/jimugivos/8674952027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6519eace-3e77-42cb-a157-f3225546919d/65073950717.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/pukinuzobufomaxapasaxure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd56c0a-2a2c-4c1b-b784-b57177f5d6cf/good_english_grammar_book.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_9b4edfb298384e81b2306d2054eccf1f.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_5b5f16c9160c4cf7ba380a158adece49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokofapig/spec_sheet_template_fashion.pdfIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_95c6d9a5ae984fd3b03ad886cf52357d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/how_to_make_a_daycare_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/tatuwoxegu.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/lemeruvivenozaf.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/hypo_and_hypersensitivity_related_to_autism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89825972-ee72-46fb-88ea-3eeab35930e0/new_yorker_magazine_frame.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_46635b49ab444d0bb9442a0d129fa464.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96bc6fd-fea4-4e3d-9feb-84faf328f36c/boy_roald_dahl_audiobook.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_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5548 bytes
SHA-256: 9fdabf1f64713340a0a37b8dd236625ab8b650ff58cecbbe456ce9d8e1c37976
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 12540 bytes
SHA-256: 8fe4ef380e9a1624c0dfc7c5127592e43a6df2304a8e7548d214bb072c8d24fb

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