Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab80d1bfa34988ed…

MALICIOUS

PDF

81.2 KB Created: 2021-03-13 16:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b35cfcca56703a3cb6d0307bd3d79474 SHA-1: dd579dd835224888ad0823a0f11607c5b30c50bf SHA-256: ab80d1bfa34988ed526cd926eda4533d695a1ea2d30fb1d7a132b2cfc6b17911
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, as indicated by ClamAV detection and ML classification. The document body, though heavily obfuscated, suggests a lure related to 'how to make a clothesline pole' to entice users to click the malicious link. The presence of external URIs and the overall detection by security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=how+to+make+a+clothesline+pole PDF link annotation
    • https://cdn.sqhk.co/tefazaturar/8Eiihhh/10845640710.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/ygciihe/windows_server_device_manager_command_line.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_5ff918e2e8184.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/4iaDbge/family_events_in_atlanta_tomorrow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ffc667490109.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/hcidXhf/free_manga_creator_software_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393506/normal_5ffc213f7366d.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/a4bghia/78702654996.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepojofugag.rf.gd/41692826788.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/81450635307.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/afip_siradig_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/bollywood_movies_song_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/star_wars_ahsoka_show_trailer.pdfIn PDF document text
    • http://kupuwatuz.epizy.com/bruice_organic_chemistry_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/what_is_the_main_problem_in_flora_and_ulysses.pdfIn PDF document text
    • http://danidarexixuw.epizy.com/53520050784.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/introductory_mathematical_analysis_for_business_economics_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/89489039562.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/70176829374.pdfIn PDF document text
    • http://wigomevunafufo.epizy.com/25079851659.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/legiwinozovobamodizogixi.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/90044184903.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_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 5192 bytes
SHA-256: c08e359099f6bc33ba114ed23aa7e116797489fd1b0a1ad511ac94fdffd67786
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 11356 bytes
SHA-256: 1a113e6214d5c7b6fe45fb5a6f3e3ff3835a7497deca29cc272113b8aae3396b

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