Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9442bbb6212529…

MALICIOUS

PDF

79.4 KB Created: 2021-05-08 14:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c1c09485dcb8e799853f9f5ef595188 SHA-1: e9fad8e8d5a37f79b59d3f16a21e49aa5bcdfc5d SHA-256: ad9442bbb621252945b480665d01301530150648f047b68c8cb253a23be113cd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, suggesting a phishing or malware distribution scheme. The primary IOC is the URL 'https://golowaki.ru/strik?utm_term=starfinder+against+the+aeon+throne+maps', which is presented as a lure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=starfinder+against+the+aeon+throne+maps PDF link annotation
    • https://wivetagimogik.weebly.com/uploads/1/3/4/6/134618772/dikirivopom.pdfIn PDF document text
    • http://itdiscounts.pro/how_much_does_a_construction_project_manager_make_a_year9in5o.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/64426229041.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/1920586.pdfIn PDF document text
    • http://fineagencyy.com/1543037872d4upf.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/6189572.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/domevapumusavew.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/31037221636.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/55209725426.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/modixijox.pdfIn PDF document text
    • http://vipmanmarket.space/how_to_put_the_bobbin_case_in_a_brother_sewing_machinedrzry.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/187ffdd03bb445.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://uploads.strikinglycdn.com/files/7f12a127-ede3-48a0-897c-0a16ef3b4cad/position_vs_time_graph_describing_motion_worksheet_answers.pdfIn PDF document text
    • http://jejivosijej.rf.gd/18696553241.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/tekoxesinagosavabavizoloj.pdfIn PDF document text
    • http://tubasip.epizy.com/35518941579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afc0fd0-de74-4a03-9159-b4dbdf98ec3f/how_much_does_an_electrical_project_manager_make.pdfIn PDF document text
    • http://nalezedos.rf.gd/zijatagavokoxavulik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26759a9c-4578-468f-93d9-95a71f26f7b2/89783828329.pdfIn PDF document text
    • http://goziwofa.rf.gd/who_to_call_for_kenmore_dryer_repair.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_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 5312 bytes
SHA-256: b7cc4d6c7ab06d698d00f39cbc61b81fa60ea641ebdca84365913c9675fdd537
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 12068 bytes
SHA-256: 2ea9c4bdca16d1b7c1b527b0cc8691d3fab33a8e96766f222037ad517048c527
font_02_sfnt_off00012088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12088 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333