Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e769ecd47091a0…

MALICIOUS

PDF

66.7 KB Created: 2021-01-15 18:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a6d38b8a1ec3b98fcbb2619748029b5 SHA-1: 797a9ab8fe441f7702b63705243017ea0e9adc4d SHA-256: 11e769ecd47091a045e12ce06cac91b4029852517ca532c613ff56ba19108efc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=hayward+de+3600+filter+manual PDF link annotation
    • https://site-1166598.mozfiles.com/files/1166598/118591190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5fd6d0562efa4.pdfIn PDF document text
    • https://site-1179389.mozfiles.com/files/1179389/dogfight_2_game_download.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/8399365.pdfIn PDF document text
    • https://difekubo.weebly.com/uploads/1/3/4/7/134714923/7791475.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/sinajefufu_pofubilifumegap.pdfIn PDF document text
    • https://site-1174218.mozfiles.com/files/1174218/brick_breaker_ball_game_free_download_for_pc.pdfIn PDF document text
    • https://site-1176438.mozfiles.com/files/1176438/73533749144.pdfIn PDF document text
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/a0d69d.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/vuraradaso/vojatamewibe.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/physiology_book_for_bds_1st_year.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/chelsea_new_york_shopping_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/sap_homogeneous_system_copy_guide_windows.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_off0000b944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB944 5260 bytes
SHA-256: 3d6bd0fd6ac35fa3befab9ecc35545a4a3e152b51958ccaa251f5dfdc967750e
font_01_sfnt_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 10836 bytes
SHA-256: edcb2653e05269a2ee4abb673315885df935463de55ad3b85cc8a1c97e50a31c
font_02_sfnt_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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