Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6aab54af8a887f…

MALICIOUS

PDF

67.2 KB Created: 2020-12-11 05:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 71c1a2c72db564787a8004346feae170 SHA-1: 1fcae2fca196eb629c39fe497abd26f4f2d88cfe SHA-256: 9c6aab54af8a887f6acf6f57cb5d1a1127fa0491688fa3fc8388187575d46040
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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=hamilton+beach+flexbrew+user+manual PDF link annotation
    • https://zoforofutesabuw.weebly.com/uploads/1/3/4/7/134751738/nuduxez.pdfIn PDF document text
    • https://vikilegopufuber.weebly.com/uploads/1/3/4/5/134588451/nizokixekefa-nerat-wuraka-rituwibanad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465687/normal_5fac2c0927431.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://uploads.strikinglycdn.com/files/f2136362-eb12-4dd9-aa41-51825af0c148/mewapaxonika.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/68248339865.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/gajuvofenejofubivifesuku.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/abcd_2_movie_all_songs_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/capello_clock_radio_manual_cr60.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/americo_castro_el_pensamiento_de_cervantes.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/zufuxafoferupoliwopiwob.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/medical_report_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/widemufokupemupa.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/groups_and_periods_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70e0a791da6493f683ef5/t/5fc97467dffee555151398ce/1607038056199/1752758350.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_off0000bf21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF21 5264 bytes
SHA-256: 3b2bca49bfe53a4f565ad3cba6f5477e49451afcc3b96ff6c9f1e7b52f368a97
font_01_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 9732 bytes
SHA-256: 38520969a17bd57118be544247cde6f0a418b2db424a502a0b943069e92037dd
font_02_sfnt_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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