Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4166285d05e076…

MALICIOUS

PDF

87.4 KB Created: 2021-03-22 15:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 55d2116c2ff2c80bddf437a7c89c7091 SHA-1: dc15c7da484fd4e8f13ca48950879a0525fca675 SHA-256: fa4166285d05e0760c83c84f1b4231cba9effbe7662f3090dea8022979fd89fa
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

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://gimoguvi.ru/123?utm_term=photographer+business+card+template+psd+free PDF link annotation
    • http://metinozub.iblogger.org/hyrule_warriors_definitive_edition_character_guide.pdfIn PDF document text
    • http://maroron.22web.org/zowapekub.pdfIn PDF document text
    • http://xviiivbgz.com/17755397814arwpg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_601d244dcac00.pdfIn PDF document text
    • http://it50off.pro/dumovufesojaxakozitepzrjnz.pdfIn PDF document text
    • http://wofatis.22web.org/online_video_er_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_600506ac6fd26.pdfIn PDF document text
    • http://trysalon.xyz/830766917720t0zw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_8860259243d946fcb94b5565730d0fab.pdf?index=trueIn PDF document text
    • http://lajimaju.epizy.com/royal_canin_development_puppy_canned_feeding_guide.pdfIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_8bc3d94d80344bc591cb00438fb017ca.pdf?index=trueIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_afc9073e8d574bf184f9dc57e5625d24.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_a66eee9932df44759d008154335d461b.pdf?index=trueIn PDF document text
    • https://f9cb7010-568c-45d0-b0a5-7bd630b60272.filesusr.com/ugd/b10ea2_dbc94d65c2b944df8ebf6ca7b4bc3b02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogijexu/dslr_camera_editing_app.pdfIn PDF document text
    • http://nujemapamonaj.epizy.com/honda_generator_2200_run_time.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/scotsman_prodigy_ice_machine_red_light_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/cycle_games_for_pc.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_d76b67f3e410496c89017761992250cb.pdf?index=trueIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_c053c87b2c904fbeb085329789057935.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_9a895e6edaed4d70a9dca1db42f935de.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
    • 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_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 5712 bytes
SHA-256: 1bad04bc6fa944646e313977cff32892774cd03d355f16b792d0e49b97144968
font_01_sfnt_off000110ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110ED 11580 bytes
SHA-256: 2f180deacae39da366f8a09aab37e6b98c3097cf615ad2d21ec8ec91c7d9a0ba
font_02_sfnt_off00013891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 16660 bytes
SHA-256: 30fc2ee1d3c0f3cb8da72a1aee3522d75394ad8837458bf90354c649055702ec