Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b963f926db13bd5…

MALICIOUS

PDF

89.2 KB Created: 2021-03-19 06:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f2110e24dea5e1e2c005d5576d9ea703 SHA-1: c229e17b5b490ff7c62c57e95f3f28107a8beac0 SHA-256: 8b963f926db13bd54888790800a0c7c6cb6ce7a879fa5a98c63165511709679d
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a high-confidence ML detection for maliciousness and a ClamAV detection for phishing. It utilizes an SEO redirector link to a domain that appears to be part of a phishing or malware distribution chain. The embedded URLs suggest a pattern of distributing malicious PDFs, likely as part of a phishing campaign.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/wix?keyword=makita+ls1216l+parts PDF link annotation
    • http://rabuvuz.iblogger.org/negative_prefixes_exercises_with_answers.pdfIn PDF document text
    • http://cheatyou.site/56652461245q73tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_5ff81ee0b7d57.pdfIn PDF document text
    • http://puxuxin.22web.org/17339013931.pdfIn PDF document text
    • http://vuwadezizubem.22web.org/city_of_heavenly_fire_book_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5ff3f7778dfd4.pdfIn PDF document text
    • http://itgermany.net/clarion_nx501_radio60k40.pdfIn PDF document text
    • http://marojuburegorad.22web.org/35403994601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5ff50248eeb38.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/data_sheet_display_7_segmentos_anodo_comum.pdfIn PDF document text
    • http://nominasacra.ru/csgo_free_steamd75gs.pdfIn PDF document text
    • http://givepamodugag.22web.org/axe_alliance_x_empire_vit_nam_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375342/normal_5ff32e291a52b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punexowimuseva.epizy.com/tension_pole_shower_caddy_directions.pdfIn PDF document text
    • http://niwuzij.rf.gd/jeep_grand_cherokee_limited_1999_manual.pdfIn PDF document text
    • http://guxedin.rf.gd/kigizigenazijigova.pdfIn PDF document text
    • http://puwagof.rf.gd/27847192528.pdfIn PDF document text
    • http://gamupuzif.epizy.com/boruto_wiki_episode_guide.pdfIn PDF document text
    • http://panabodu.rf.gd/71589837060.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_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 5220 bytes
SHA-256: a5f3c8e160d2f78b1d32b35749c3119a4d72147930c8577567ac0a912ba2d7eb
font_01_sfnt_off0001345e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345E 10036 bytes
SHA-256: 5b541ca4a8b51a069d7e839bd49ea56a7f928421a2f8c30c606f692f67f74492

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