Malicious PDF — malware analysis report

Static analysis result for SHA-256 993b2caca29369e0…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 06:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc4cc0ae4a2b6fe27e019ec004160a1e SHA-1: 56823a0cd8aad0f54ae606dc32a598ee94a4ec79 SHA-256: 993b2caca29369e0f5203cb777b401574380344ad8d354679bae00d4f3f9055a
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://pelibifir.ru/strik?utm_term=stock+market+books+for+india` suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URLs are common for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=stock+market+books+for+india
    • http://bestrongbyg.com/532530865911vkhj.pdf
    • http://chunyoo.com/wososufogvrnc.pdf
    • http://mailedflkf.site/a_well_educated_mind_quotes5u4vp.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/rbchgkb/download_epic_astro_story_mod_apk.pdf
    • https://cdn.sqhk.co/lediname/intkJ6A/wefiwimilap.pdf
    • https://cdn-cms.f-static.net/uploads/4482402/normal_60557ac5e9cd7.pdf
    • https://cdn-cms.f-static.net/uploads/4497372/normal_60411590e3d65.pdf
    • http://uablog.website/pebapozuwalenim6zj2.pdf
    • https://cdn-cms.f-static.net/uploads/4485434/normal_60415dfb3c675.pdf
    • https://cdn-cms.f-static.net/uploads/4470542/normal_5fe736206c839.pdf
    • http://kumujobu.iblogger.org/private_practice_cast_season_2_episode_20.pdf
    • http://pubggaming.online/what_is_biological_in_psychologyip6n6.pdf
    • https://cdn-cms.f-static.net/uploads/4463560/normal_6051f749200f7.pdf
    • https://static.s123-cdn-static.com/uploads/4370052/normal_60094ce6d2d2c.pdf
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60188d79db1ec.pdf
    • https://cdn-cms.f-static.net/uploads/4416136/normal_601ff5a01c4f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/afa644ad-0afa-4506-828b-53f599b9842e/36545944740.pdf
    • https://uploads.strikinglycdn.com/files/edc5f3c3-f296-465c-bf38-057a402ae841/which_universities_are_open_for_2021_late_applications.pdf
    • https://uploads.strikinglycdn.com/files/cb6a5d00-299a-4fd0-9b9d-38fef3530924/dalobazopelunolibineleti.pdf
    • http://batopodati.epizy.com/26637595871.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_off0000e8d4.bin
73387572c3669dcb88e6ff4d63f1409ecf9fa343fd84e4f7fd54a5b1c67a9c51
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 5440 bytes
font_01_sfnt_off0000fb3f.bin
88eb20dc73d0d7ba6e7acb5f5cadd4a92f41e1c64b31755c5bceab7ea876bda8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 11604 bytes