Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d681d302a0691f4…

MALICIOUS

PDF

85.7 KB Created: 2021-03-15 13:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d888d77f97d583a9ffd25aeca6377bff SHA-1: 5e38998112e2080d5a431d52821355e1ad01738c SHA-256: 9d681d302a0691f438d896c5458b0a6e602f1d346e1e870e5db4d9eba79b93ee
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as guide books, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=skyrim+guide+book+pdf
    • https://cdn-cms.f-static.net/uploads/4484114/normal_601b72bff3893.pdf
    • http://buzerudi.22web.org/26357148090.pdf
    • https://cdn-cms.f-static.net/uploads/4413468/normal_6039d414ccd3c.pdf
    • https://cdn.sqhk.co/wosipuvetot/xjjgilE/cross_bridge_smooth_muscle.pdf
    • https://cdn.sqhk.co/gusijigi/YjidE5t/stop_background_of_ios_update.pdf
    • https://cdn.sqhk.co/wugeguxu/wgh92ED/littlest_pet_shop_1188.pdf
    • https://cdn.sqhk.co/gorokipo/hq0uUh3/pocket_league_story_2_mod_apk_latest_version.pdf
    • https://cdn.sqhk.co/didatife/herjbha/gupexatupediw.pdf
    • https://lexapokugivida.weebly.com/uploads/1/3/1/8/131856754/8014927.pdf
    • https://cdn-cms.f-static.net/uploads/4402486/normal_604b2f6d187cf.pdf
    • https://vifozafep.weebly.com/uploads/1/3/1/4/131407061/kimegivow.pdf
    • https://static.s123-cdn-static.com/uploads/4377902/normal_5ffda23ba6c06.pdf
    • https://cdn.sqhk.co/vunalogivefu/igE9ja0/xegudipofapabajago.pdf
    • https://cdn.sqhk.co/ferobisuw/ea2heO4/gears_of_war_board_game_rules.pdf
    • http://guzanarogenuje.iblogger.org/40639752191.pdf
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5ff3c28bdae91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/65515c1a-c085-4237-b760-c845fbb94239/newofimawo.pdf
    • https://uploads.strikinglycdn.com/files/f0533083-78b5-487d-a541-998c9f6fa606/lg_front_load_washer_error_codes_le.pdf
    • http://pixutuvaw.rf.gd/xuliberagosala.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_off0001123c.bin
1666cf0429390fd5d5c2db37b2130eaa1cba30a8eb1ef0d31fd00cee723760ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 5348 bytes
font_01_sfnt_off00012466.bin
5714cb231bb2953615b1e14d53b392b909ad7ad48651fe2b84dfcafd051e874a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12466 11036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.