Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc2afce4939ba0e…

MALICIOUS

PDF

98.0 KB Created: 2021-03-10 05:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 39059ef01535016bc4a47b8b3e0b71cc SHA-1: 50487811e7d9ef04f4d3105e7c5abdda64358b72 SHA-256: 3dc2afce4939ba0e72a8b768b44899b8c0544ea787520a51f9690b547546dc41
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an external URI and an SEO redirector link disguised as a free download for a pedometer application, indicating a phishing attempt. ML and ClamAV heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest it's designed to lead the user to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=pedometer+android+github PDF link annotation
    • https://cdn.sqhk.co/zarifabidit/zN6hiLU/rugby_world_cup_2019_winner_country.pdfIn PDF document text
    • http://tipografiyav.moscow/zujarokogezabozewezuwmwbpr.pdfIn PDF document text
    • http://imedo.ru/understanding_media_the_extensions_of_man_by_marshall_mcluhanep5pm.pdfIn PDF document text
    • http://d2-club.ru/mr._coffee_12-cup_manual_coffee_maker_black_sk130mb9c.pdfIn PDF document text
    • https://revixapega.weebly.com/uploads/1/3/4/6/134619396/xarusenido.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvuwoki/J67hjFc/zeweresabusep.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/a13hCpR/marshalls_world_of_sport_mobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426277/normal_5ff40e60f03d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6044de3df0730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5ffdba3cb855d.pdfIn PDF document text
    • http://online-bestshop.xyz/muvupazanuvoj8886.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/f6140dd673.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/4558785.pdfIn PDF document text
    • https://gafabudadu.weebly.com/uploads/1/3/1/3/131384489/pafetotafezevogagofi.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/eid1063/city_sniper_shooter_free_shooting_games_apk.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/xoxaneral/35783055501.pdfIn PDF document text
    • http://pababevo.epizy.com/maxazivipakunemexiripa.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/25923774106.pdfIn PDF document text
    • http://javisan.epizy.com/kixenirezuvotid.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/dubitikokezexeziwupuvifo.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/morufe.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001452c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452C 5168 bytes
SHA-256: 645b00853bda652afc64d2ba0febc3ca196c7472169e6a77615bd19abd0a24bd
font_01_sfnt_off00015692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15692 10656 bytes
SHA-256: 89f9c743dd74a122c6399d0d85c7a7c6bff3786df35fcd73fac2ce1017b258a6

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