Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac501ab388ec7d9…

MALICIOUS

PDF

71.0 KB Created: 2021-04-08 07:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c453178606ac7bcc4264cebbf99a15d SHA-1: d54d223fd9ce5e02cdf5245cb0faeecc0b95f10c SHA-256: 6ac501ab388ec7d943dd9e2ed718d59edc90e72f16dda6537d8575cb639dcb43
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'https://resalured.ru/123?utm_term=as+1579+pdf', which is likely a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it is used to redirect users to a malicious site, fitting the pattern of a phishing attack delivered via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=as+1579+pdf
    • https://cdn-cms.f-static.net/uploads/4381340/normal_604b5157cd980.pdf
    • http://woxijakuzadajew.getenjoyment.net/84480737587.pdf
    • https://cdn-cms.f-static.net/uploads/4426073/normal_60522f15bcfbe.pdf
    • http://sizerasadaxer.mywebcommunity.org/piwunizokejodavo.pdf
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fcdaf4fbcc28.pdf
    • https://static.s123-cdn-static.com/uploads/4471711/normal_5fe04109657f3.pdf
    • http://kusadelopo.iblogger.org/backup_android_photos_to_mac.pdf
    • https://cdn-cms.f-static.net/uploads/4380405/normal_6050384254d75.pdf
    • http://pozijuza.scienceontheweb.net/100_item_answer_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legapatatezisa/how_to_draw_better_lines.pdf
    • https://s3.amazonaws.com/kulinisokakewi/tazeja.pdf
    • https://s3.amazonaws.com/pilazi/diverticular_disease_diet_sheet_nhs.pdf
    • http://gogivumasamudob.epizy.com/briggs_myers_test.pdf
    • http://gixojur.epizy.com/canon_e560_setup.pdf
    • http://baletax.onlinewebshop.net/zakikukiduk.pdf
    • https://s3.amazonaws.com/nazekisigiduz/lenovo_thinkpad_t430_user_manual.pdf
    • https://s3.amazonaws.com/jixeremipet/netgear_r6200v2_specs.pdf
    • http://xovolefewawex.atwebpages.com/lidilupo.pdf
    • http://pojozija.onlinewebshop.net/85519980872.pdf
    • http://wozaxanakix.epizy.com/des_cours_pour_apprendre_l_anglais.pdf
    • https://s3.amazonaws.com/kakekojezutok/75829991507.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_off0000d8a3.bin
3acaafb4c615adafc7ba39aa6e492157fc3dcc9a1c2f4f78142f536f373af2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5100 bytes
font_01_sfnt_off0000ea2c.bin
8557f989f130c5f9d3d3b9c55defbf2648941504829219e4d62ee2b389230d42
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 10688 bytes