Malicious PDF — malware analysis report

Static analysis result for SHA-256 32076ba96130384d…

MALICIOUS

PDF

82.9 KB Created: 2021-05-20 02:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a7a4cd30ce0632b25e24198031f4e40 SHA-1: 2dcb2aeb43183cb3bac3d86401a3c1779562bc4a SHA-256: 32076ba96130384d779602ee014fea148f4348c52ddf40fe7ac918424c04a114
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of these links, 'https://gimoguvi.ru/strik?utm_term=compatibility+based+on+birth+date+and+time', is directly embedded in the document body. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the structure suggests a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://gimoguvi.ru/strik?utm_term=compatibility+based+on+birth+date+and+time PDF link annotation
    • https://xojajadajopun.weebly.com/uploads/1/3/4/6/134646320/bolixivala_gubimizufekiso_tumif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_606e524aab972.pdfIn PDF document text
    • https://bujupejokoluga.weebly.com/uploads/1/3/4/5/134576849/c94f159d.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/570a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_600c90fd907c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5fede80727bef.pdfIn PDF document text
    • https://fixizogi.weebly.com/uploads/1/3/5/9/135959929/5b97c5f2ebad1.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/gulapore/tewetoziwosaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/10115041656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2577e74-b5ac-4431-99d1-d3ad72748836/rotofugidizubemazevesomu.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_do_i_use_the_clean_setting_on_my_mr_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/why_is_my_lenovo_laptop_plugged_in_but_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d9ae21-e837-45c9-a026-c6bea425422f/how_to_fix_jet_tub_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14140a9-ff6a-4779-b652-4f17ae4babbb/79118972376.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/33814986403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d95885a-33fc-422e-868d-58710293e6c7/dimugeveviwojed.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/kbc_2018_question_5_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/sobemixiwitipazipenarufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa34ab23-68fb-4397-9dc0-be6322438b56/fantastic_beast_and_where_to_find_them_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2fcdb0-f0f3-416a-be33-d5c18951619e/curso_de_dibujo_arquitectonico_mo_zell.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/gexenipunilikutirikab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b036b40-534b-4b32-8b69-af6a0ee47648/xegukejotukan.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_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 5344 bytes
SHA-256: 803ff9ed7157e280189a1800807152858e6d505d91b3f74afb1f79a3e2c9b4a7
font_01_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 10992 bytes
SHA-256: 337179effd21cf23b13a59dcf6394655366e67b2ab6f68fe22fbe7f8a992c5c9
font_02_sfnt_off00012412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12412 17276 bytes
SHA-256: a18764de49a7d28867b82f00a20c6e5a3e356d0bc4b2e8d6177935cc85105da3