Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc7a0f9ad2f6b7e…

MALICIOUS

PDF

73.7 KB Created: 2021-03-29 21:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dda1b808b2e7827d67044032b1295eb5 SHA-1: 25b87f47b1f56771af79772740e08ba6f1c95373 SHA-256: 9fc7a0f9ad2f6b7e9e41bd1a7fd86299423867c31a121d4e289d21b648bbe4b3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a technical handbook, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=building+design+and+construction+handbook+6th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/sewadokoka/gip0ihO/arcade_hockey_xbox_360.pdfIn PDF document text
    • http://omynutural.space/how_to_change_the_battery_on_a_thermostatojier.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_6049e65e16373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fdc33ba6a3dc.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jgOBNih/92646011261.pdfIn PDF document text
    • http://sfr-espace.best/270518511525cage.pdfIn PDF document text
    • http://phrensy.co/247676437609do4l.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/hegsHij/waec_registration_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fd993d951b9a.pdfIn PDF document text
    • https://cdn.sqhk.co/luvunugoz/XKjfjjm/shelterlogic_greenhouse_in_a_box.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/dlghoge/game_of_thrones_cast_season_6_episode_10.pdfIn PDF document text
    • http://bogplaktnc.fun/biwuxil9l7oj.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/kamuxuzuvobemobasuwutopvce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_605286a2dbe33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivefisapef.epizy.com/are_there_any_recalls_on_2008_ford_escape.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/44376506606.pdfIn PDF document text
    • http://zulojivikedeg.epizy.com/xosazizabimese.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/why_is_my_kenmore_dishwasher_light_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/gutapuzali.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/9853754981.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/mavegawevizuvevezem.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_off0000e1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 5824 bytes
SHA-256: 6efd2d0e7d1880f97d6bdc1d8f28a4d02e8b4bdfd9e7d09b882f122c84d26b3a
font_01_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 10404 bytes
SHA-256: cc5a1fd3d8617c4a8143ba61eec4137e0e0b5b1588d9eebe1fc1968b4cad1ea9

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