Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a317e753850dea5…

MALICIOUS

PDF

88.9 KB Created: 2021-05-14 14:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8480bad2a75b7cb207e6af2f3b47eb49 SHA-1: d21215e1afa9b5c54413b06e4a870a9c0a16a12b SHA-256: 2a317e753850dea5b64ada9beee5578618bc2bf2441da65df8217c11cb42f87f
136 Risk Score

Malware Insights

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

The PDF contains suspicious links, with one explicitly noted as an invisible lure to a domain hosting a PDF file. ML classifiers and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious resource, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://vilenefex.ru/strik?utm_term=is+monat+regulated+by+the+fda
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5fdbc6ecac490.pdf
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5fe7e10d649dc.pdf
    • http://gifozazupu.iblogger.org/traxxas_rustler_4x4_vxl_brushless_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4491175/normal_604d1d41af2a4.pdf
    • http://securityofusersdevicesonline.site/zamogonawokuxeky3bwn.pdf
    • https://static.s123-cdn-static.com/uploads/4379234/normal_5ff944a957894.pdf
    • https://cdn-cms.f-static.net/uploads/4370744/normal_604da628d33c9.pdf
    • http://raisinsapp.pro/gta_san_andreas_cheat_superman_codes_ps2_minigunltdvw.pdf
    • https://cdn-cms.f-static.net/uploads/4454184/normal_6045e689c705b.pdf
    • https://static.s123-cdn-static.com/uploads/4417652/normal_5ffda8e0bbebc.pdf
    • http://idealslimitalia-oficial.site/slow_motion_editorqa1mx.pdf
    • https://cdn-cms.f-static.net/uploads/4413865/normal_602cfd470b937.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/widuxade/fundamentals_of_physics_9th_edition.pdf
    • https://s3.amazonaws.com/puretulenuza/80974295775.pdf
    • http://podemerobetalax.epizy.com/bittorrent_for_ipad_free.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/cuanto_es_3_1_4_pulgadas_en_cm.pdf
    • https://s3.amazonaws.com/pigolo/blocking_restricted_numbers_on_android.pdf
    • https://s3.amazonaws.com/lonozote/wapking_bollywood_ringtone_2018.pdf
    • https://s3.amazonaws.com/zinudipir/kodusupatezaluvoton.pdf
    • https://s3.amazonaws.com/nefunupu/34035647898.pdf
    • https://s3.amazonaws.com/kobivimelelo/7062965734.pdf
    • https://s3.amazonaws.com/vebogotexaf/elementor_templates_pack_free.pdf
    • https://s3.amazonaws.com/wazotojemov/jquery_locale_number_format.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_off00011b08.bin
0485a41016acc29c18b809547c7b782ef53a60a1d5f7bae5f11cf17e738a6100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B08 5500 bytes
font_01_sfnt_off00012d93.bin
28e8163b139f1065764b9ce43b852a4c923e7ffd011246b42beb33e2cd4e4ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 11488 bytes

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