Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee452016f158c83…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 06:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e78a028a224a6219e352d5ba8a737d01 SHA-1: 6919383d0bf18fff4d6e4303909d4967a1e5998f SHA-256: 9ee452016f158c835aadbd67a7a0877166050c1f95234dac995cfc6a3903706d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on free web hosting services, indicating a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=here%2527s+negan+board+game+rules
    • http://lamorebeduzakoj.22web.org/dunakotawumorega.pdf
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/6932cc06.pdf
    • https://cdn.sqhk.co/xuxiropuwomo/icCgfF9/smash_mouth_all_star_lyrics.pdf
    • https://cdn.sqhk.co/ketejeti/EbpWjet/oversized_wine_bottle_glass.pdf
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/71b8e8d5d3928.pdf
    • http://remoliwagofaju.mywebcommunity.org/lomawosutet.pdf
    • https://cdn.sqhk.co/volumusigu/7LpWrhd/super_tank_lego_star_wars_3.pdf
    • http://jikusofare.mywebcommunity.org/texas_instrument_ti-83_plus_wont_turn_on.pdf
    • http://lizowaw.scienceontheweb.net/chemistry_book_class_12.pdf
    • http://magatapomuv.22web.org/zeliwiwodidanopimipowimu.pdf
    • https://cdn.sqhk.co/subesanodag/hwgeOii/fevekevediluped.pdf
    • https://cdn.sqhk.co/zapiseniw/gfgiUic/24777864055.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://medexode.atwebpages.com/ludamemixasitemuputomizi.pdf
    • http://dikinobi.rf.gd/82030133490.pdf
    • http://suduxegowur.onlinewebshop.net/weganatobibewikuwesa.pdf
    • http://sekovukubetib.epizy.com/bitoxivujaxe.pdf
    • http://gajamozaxekega.atwebpages.com/fawifibokeb.pdf
    • http://wowutuzineko.myartsonline.com/29382199778.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_off0000df62.bin
0082366f4f417a209e1276e4ad4bd275e46fd4af48ab48962c4c1f2da2be1728
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 5280 bytes
font_01_sfnt_off0000f142.bin
5c8cf7134e796475eb87a418ad473c074d23b85a4351213f72c904d9174c301f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 11120 bytes