Malicious PDF — malware analysis report

Static analysis result for SHA-256 510b064ad8ed5c4c…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 08:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caab9502e794a54507f9c89618a39a79 SHA-1: 41dcb868854e6d0661cee2a735eaa084b522e82d SHA-256: 510b064ad8ed5c4c560ffac1cb2e3f81e9b232f6db608c7914773ce6c801d68e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically indicating a phishing or trojan threat. An embedded URI, 'https://leonvi.ru/wix?keyword=tracfone+code+entry+mode+parameter+001', was identified, suggesting the document's purpose is to redirect users to a potentially harmful site. No scripts were extracted, but the overall structure and heuristic firings point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/wix?keyword=tracfone+code+entry+mode+parameter+001
    • http://vawifasu.22web.org/15172548996.pdf
    • http://kedugobepuged.mywebcommunity.org/liwofamomamuwinen.pdf
    • https://cdn-cms.f-static.net/uploads/4501791/normal_602d5b74c3209.pdf
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5ff1836a7e4f8.pdf
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fe4de26267f1.pdf
    • https://cdn.sqhk.co/fevivesuxofo/icjbhch/adventure_shadow_foxy.pdf
    • http://vumajufeboxidik.mywebcommunity.org/how_to_make_mini_paper_stars_easy_step_by_step.pdf
    • http://pazobano.iblogger.org/bonedefadazeloj.pdf
    • https://cdn.sqhk.co/rizuwevize/ifgj3ZD/61385148087.pdf
    • http://tukebifivimix.iblogger.org/colorado_state_music_standards.pdf
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5fedf637023c3.pdf
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602cb27e958a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://teworubinogo.epizy.com/drumming_music_sheets.pdf
    • http://jokubamobivavum.onlinewebshop.net/zudunezusanegovi.pdf
    • https://uploads.strikinglycdn.com/files/69a05483-d2a2-42e6-9ccd-b8e40850bac8/what_lg_phones_will_get_android_10.pdf
    • https://uploads.strikinglycdn.com/files/6376057f-4d08-4b3c-acdf-e699da8513cc/v_shred_metabolic_confusion_reviews.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_off0000e379.bin
31c1796a11831aaf31d511133219235ce61b05ec53112e6445c29e4ed6083b36
pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5336 bytes
font_01_sfnt_off0000f597.bin
5cb73f83a2f28a03615938bbffbc60423a212425807c1149c793314c4318f8f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 11704 bytes