Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d535da17ca25ad…

MALICIOUS

PDF

110.0 KB Created: 2021-01-25 22:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: db9541afbf1c5d6cf49789d958ef932f SHA-1: 58b988056290949d9a010a4ef7f5db0bec6d9a56 SHA-256: 39d535da17ca25adcf7ca3023fcec9d65daaf3a707a070007a4480c3b5ba214d
176 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the 'SE_CALLBACK_LURE' suggests a potential phishing context. The presence of multiple unknown URLs points to a malicious campaign aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/wb?keyword=gizmo%20vr%20player%20360%20virtual%20reality%20videos%20apk PDF link annotation
    • http://milanomoda-italy.website/hydro_dipping_with_spray_paint_instructionsgf3t6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5feb4a6620c05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fec08ca351c4.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/0a2d8ebe1d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5fc685019e045.pdfIn PDF document text
    • http://nakrutkavk.site/danmachi_memoria_freese_reroll_tier_list_2020medwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fc91399db104.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/folanelirovegew_bogeka_mapetotevogo_fajiku.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/mudebusu.pdfIn PDF document text
    • http://keep-travel.com/34369282681ctt2m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_5fd9290467419.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/todiruked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471514/normal_6007d7f53e004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fe6a54f5e34b.pdfIn PDF document text
    • http://scoretdho.best/live_skull_wallpaper_for_pcdburb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A6 3308 bytes
SHA-256: 24a09cef2edf9c32c826d4348c441ec9563984b8dd65301faa70d43c945e3965
font_01_sfnt_off00015408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15408 5872 bytes
SHA-256: 7f7f1fea3fda1372d54cfdee05d370bd232690aaeac51e89b72d7299b87e2c5f
font_02_sfnt_off00016802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16802 11884 bytes
SHA-256: c6c72531003b45a56b9220a4677e61b6ef4c9e1bb24b79165d1a7acfa688d56b
font_03_sfnt_off0001909a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1909A 17628 bytes
SHA-256: c8367d3f35b85cb6c1e70fbb61afc288513a92d7412a13fc668c35dcb6be9e88

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