Malicious PDF — malware analysis report

Static analysis result for SHA-256 0386cc35c407d729…

MALICIOUS

PDF

87.3 KB Created: 2021-03-03 15:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bdd777a277158d30479f0aa5ee1dd23d SHA-1: 2124c3609ab67707dbac62532da08f76c713e8f6 SHA-256: 0386cc35c407d7294d0df16fcfb902c401b2c345d622f9fad6fc02960d48b256
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-related and point to other PDFs, suggesting a link farm or redirection mechanism. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further indicate malicious intent. The embedded URL 'https://baarspo.ru/123?utm_term=indian+navy+jobs+2020+12th+pass' is likely a lure to direct users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=indian+navy+jobs+2020+12th+pass PDF link annotation
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/bijuka_fodijepal_gozemete.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/zanapidipezubep.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/AhjdFjg/blaze_and_the_monster_machines_full_episodes.pdfIn PDF document text
    • http://stroiline74.ru/sifopawiwabokirfe698.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/ibiebYz/82242724564.pdfIn PDF document text
    • http://greatholl.com/philippine_merchant_marine_academy_application_formbh58p.pdfIn PDF document text
    • http://freshnatur.fun/how_to_set_up_citizen_eco_drive_blue_angelsgyijq.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/1428fd.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/bepoduzex.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/bomifabipi/53657481690.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/6662920650.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/93769483415.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/how_to_cite_in_footnotes_chicago_style.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/calculo_estructural_ingenieria_civil.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/beyond_compare_3_diff.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/91976891135.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/dish_network_guide_frozen_screen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 5560 bytes
SHA-256: 78d7d5abb3e01edf03c0ca3b42e47a99742ba56b3460993371cfc604f5a108d6
font_01_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 11480 bytes
SHA-256: cbb66f21dac965ff38e742fa79853326217e8af6ec2068271ee0dca0db9fd4a1
font_02_sfnt_off00013aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAE 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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