Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a34e238bffaf550…

MALICIOUS

PDF

72.6 KB Created: 2020-12-16 12:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e15eb4ae047cc349ad2a1b7264716d00 SHA-1: 9da4942ac0def958538c4bac99b64e06b1fb76f1 SHA-256: 8a34e238bffaf550623964526bc951302b3caa1e7fe622a79c3f5161a725a1fb
216 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, evidenced by a large number of external links, including one pointing to 'traffine.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to direct users to malicious content or to manipulate search engine rankings. The presence of 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may be intended to trick users into believing they need to open a password-protected archive, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffine.ru/123?utm_term=beach+chairs+with+canopy+bjs PDF link annotation
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/4753822.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/1ac0ba5df09.pdfIn PDF document text
    • https://xugomijomib.weebly.com/uploads/1/3/4/5/134578432/dc541c7f3d0b.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/245fa5516b8116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xalasawu/wind_turbine_lab_report_osu.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/ruxinenuwod.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/body_language_tips_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/end_of_year_anatomy_project.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/aryabhatta_biography_in_hindi_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fcdc5aba87f9f1b19f95dc8/1607321003935/download_game_footrock_2_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aef80b6b03258f41001c/t/5fcf61d6faf0bc04d1cb3724/1607426524941/womexeviru.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/adb_install_apk_on_real_device.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/kgf_chapter_1_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/ddlj_full_movie_watch_online_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/organic_linen_sheets_canada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 5236 bytes
SHA-256: 8459fd68652a0c5d1c61b5d7dc2a3793e36cf5eb3da4aa7ccf8d435023d288b0
font_01_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 11232 bytes
SHA-256: 3905ef63ed99a5e94ff2b41d0dd9392719c199ce7d970c75299366d5ec0290bd
font_02_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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