Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e949e1086090173…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 05:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ce1f3dcb9b07cdf9a63063d4135c466 SHA-1: 7e9a166f409628723cbb59cdb5ff3de47468248d SHA-256: 8e949e1086090173a9e293ef909bc1ecb7a39d95183733fa1fadd6a4508ae7c2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, including a link farm to other PDF documents, suggesting a tactic to distribute malicious content or engage in SEO manipulation for phishing. The presence of embedded URLs further supports the malicious intent of directing users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://vilenefex.ru/award?keyword=genetically+modified+food+books+pdf
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/9669e70b32aba9.pdf
    • http://mapotilij.mygamesonline.org/saregir.pdf
    • https://cdn-cms.f-static.net/uploads/4444636/normal_5fdbe75b97585.pdf
    • http://flash-sar.online/95995658562too2o.pdf
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5fd796e277732.pdf
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fe656f47ba89.pdf
    • http://domavera.ru/98450308614afjqu.pdf
    • https://cdn-cms.f-static.net/uploads/4473445/normal_603418eb2da32.pdf
    • http://kifisafobubupo.mygamesonline.org/have_noun_feel_adjective_exercises.pdf
    • https://redobikarus.weebly.com/uploads/1/3/5/3/135396910/abc23852.pdf
    • http://copyrightram.net/survival_craft_apk_softonic091i2.pdf
    • https://cdn-cms.f-static.net/uploads/4450243/normal_6049be5dc9558.pdf
    • http://blancer.xyz/is_the_bible_in_greek_or_hebrew21hlt.pdf
    • http://mavpa.fun/can_i_bypass_a_dryer_door_switchq7vw6.pdf
    • https://jasasexu.weebly.com/uploads/1/3/1/1/131163864/suvozifilo-zazadawig-gamem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xonezerimagu.rf.gd/33217517566.pdf
    • https://uploads.strikinglycdn.com/files/9fc321ad-b5de-4361-8036-18ff1a96c909/moon_river_ranch_wedding_venue.pdf
    • http://ranuvukeguzekiz.epizy.com/58918096934.pdf
    • http://giwijivesugamez.epizy.com/manarazoruxirizuvebaxa.pdf
    • http://pedirokufadapul.rf.gd/big_game_book_summary_stuart_gibbs.pdf
    • https://uploads.strikinglycdn.com/files/64782665-7387-4a08-9c2e-1f201a53d591/gabriels_inferno_series_book_4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6f.bin
8faf8c075a5a890ce065f4cd70b8b07aa58d7f0902c3338888838309c62b0e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 5540 bytes
font_01_sfnt_off0000ff49.bin
8991014403f5d70cd15747e0602e519305dcacba51c687e75d10c6af1ece97de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF49 11880 bytes

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