Malicious PDF — malware analysis report

Static analysis result for SHA-256 73532396ae92fada…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 20:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cd4135de5eaf652999778cca9614f89d SHA-1: 068e678fa1ffc1fa942f1897f22f69a0a91919e8 SHA-256: 73532396ae92fada1da8a71788473df06d43052d0858dd03225e945210b6f569
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to direct users to external websites. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URL points to a domain that appears to be used for distributing malicious content, likely to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/award?keyword=cooling+tower+project+pdf PDF link annotation
    • http://mini-cam1.club/are_the_national_museums_in_washington_dc_openible8.pdfIn PDF document text
    • http://natfreshik.fun/pezotisomebifinidkci8i.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/31300276093.pdfIn PDF document text
    • http://securespot.ru/wisagerolutogewubokafumuj2iei3.pdfIn PDF document text
    • http://merovew.xyz/xuzidudaduruwijv1ax.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/how_to_workout_without_weights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6028ad15-887e-4ea1-ad33-35647a09e1c0/motorola_modem_sb6141_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10ebab5-7375-40c7-b738-19e95a0a8ead/how_to_increase_volume_on_acer_monitor.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_cc54931dbdda4155a2a5e312383040fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40435632-25dc-4ee2-8742-e25e180f8cf1/how_do_you_make_money_on_twitch_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1660744-2ec4-467e-9cbc-c0a0c5b3ec42/is_william_afton_a_real_person.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2962334d-7d2e-48a5-a802-096e56f83cb8/wen_2000_watt_inverter_generator_vs_honda_eu2000i.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_e19c6a6852904533b74fdd070f88396f.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_6469e4d7470b403baa3b82f3ce36ed06.pdf?index=trueIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_60fbc27a689341daa1e93fb5aeb8dc51.pdf?index=trueIn PDF document text
    • http://bidejepeko.onlinewebshop.net/64280837669.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_bbf1a4b4111e4ffda23d05d6d2577b33.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_5f178f180c0c46f28357f50971be72c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc451f4-9716-41d6-bcab-7c1337ad7e15/sennheiser_rs_175_rf_wireless_headphone_system_price.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/wifokebepiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0031134-818d-4efe-b4ef-b2de0a7c8741/zijoz.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_4377e7171d174846ac913415188d347a.pdf?index=trueIn 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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 5008 bytes
SHA-256: 4d0df9c79121c5a7b086a532c04d4772a3b4e08f81eb1842221cb5e90fb8b6be
font_01_sfnt_off0001057e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 10600 bytes
SHA-256: 56f514e6a6c2027662f37b2b312dc8892616ff189419782fca81ac15e0554970