Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a353d9e8c0907a…

MALICIOUS

PDF

67.6 KB Created: 2020-12-18 13:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2b969c56c1011713ec631fe51e886133 SHA-1: 83debddc5a8d8ee9f134f2965154f8b0e171f08d SHA-256: 71a353d9e8c0907a8387c9511fe70d879bdbf609b4d1f6843036b528b5d27b10
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. Heuristics and ML classification strongly indicate malicious intent, with ClamAV identifying it as a phishing trojan. The embedded URL is the primary indicator of compromise, likely serving as a lure for further malicious activity.

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://traffnew.ru/strik?utm_term=fool+for+love+script+buffy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd656223bd08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f95cbc54f84f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5f9bbce11ea4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fc664b27cc7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fc8730a25c7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanaladu/85301178384.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/consumerism_in_fight_club.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/sodium_naphthalene_sulfonate_formaldehyde_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/xevaxewebemoselogozu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc571d8a5bc066edfc42d69/t/5fc86a2d217b3604eddc0b81/1606969901990/64636308350.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/chrome_app_karna_hai.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13f7d5687f52b6b837984/t/5fc8e355bbb7f45a92959680/1607000917689/homeless_shelters_near_me_open_on_weekends.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d58812facd59cebf5847/t/5fcf644d0496d067bdd236dc/1607427150035/train_control_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/projekt_1065_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/bad_company_movie_in_tamil.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBD 5056 bytes
SHA-256: b4d31ba25f9b6c8ac27e3d2a90981a7a38321715979cb2e52201d9c23c737325
font_01_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 9772 bytes
SHA-256: a0e56dfa88923d64a3081e56df709185e949c3cfbc59f2e26e78031e4d7aee1e

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