Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d91406fbabf457…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 04:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c6d19db52c95f8cbf47e646251192f08 SHA-1: fe69a7888260c4fab411ad4b3d8ceb71c23b005e SHA-256: c2d91406fbabf45721a1e643e62e9044fe8243f7d4dcf4dbda2f44bba4dde6af
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, "https://baarspo.ru/wix?keyword=mx+player+download+apk+uptodown", suggests a lure for users seeking software downloads. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like intent.

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
  • 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://baarspo.ru/wix?keyword=mx+player+download+apk+uptodown PDF link annotation
    • https://cdn.sqhk.co/fawabanof/4ljir4z/last_day_zombie_survival_shooter_top_shooting_games.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/rujisijonoj.pdfIn PDF document text
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/e1c10b50.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/4f84b.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/icbjeFQ/human_resource_management_system.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/14db65256967eb.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/f9edb0701f.pdfIn PDF document text
    • https://cdn.sqhk.co/wukibezoso/jjhjQyI/suwijevo.pdfIn PDF document text
    • https://xasavogo.weebly.com/uploads/1/3/1/8/131856096/bufununetelal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mudurixo/les_miserables_2012_song_list_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/89800808280.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/rosuluwitufosabilaka.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/2014_gmc_acadia_navigation_manual.pdfIn PDF document text
    • http://manutilo.epizy.com/bewafa_song_pagalworld_imran_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/hymn_of_acxiom_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/68979495267.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 4940 bytes
SHA-256: b3e367bde5be145fb5706bf1db67f40bc15c8c818f06df61fdd2bd1291607b9c
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 13192 bytes
SHA-256: 6e514b60f089acfe5042782c8a06e52bc310a263c5207373211491775234693d
font_02_sfnt_off00011d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D88 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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