Malicious PDF — malware analysis report

Static analysis result for SHA-256 94acb75531c1ba79…

MALICIOUS

PDF

79.9 KB Created: 2021-03-22 23:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 196c1ac3fb60256b947b9f0b3a353898 SHA-1: 81e7e7fc55d4cb4945cc9fd7db10321d94578a4b SHA-256: 94acb75531c1ba79b25a8de178f60928141938be79e85a3daed339b8e4f0c669
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=2010+toyota+camry+repair+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/sidogorego/Pie5mFW/top_50_bollywood_songs_2018_zip.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/gFgcjaO/govaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd672458c3df.pdfIn PDF document text
    • http://marketitaly.info/observation_inference_worksheet_middle_school9o76h.pdfIn PDF document text
    • https://cdn.sqhk.co/wajinevisu/jfgfwhf/54672745200.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hbGmIhg/all_notes_in_music_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461211/normal_5fda773db1771.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/pukotibisudakbte0.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/Mn9ihsN/notadedaxeduwidopodesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_601006044ad93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5ff9900c9912b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_5fdabe4f99a0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_604aa01a5dd8c.pdfIn PDF document text
    • http://appletopshop.ru/camaro_zl1_manual_reviewlbuqr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_4be4bc20db32431ab901489d50f4ce21.pdf?index=trueIn PDF document text
    • http://rejosunugewojif.epizy.com/32281957988.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_520e7570ba9a402b88326df935e4fe87.pdf?index=trueIn PDF document text
    • http://bejumajiluwod.rf.gd/great_quotes_about_political_power.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_adb8d06a2dbb4cc0a45f1a96698a21e1.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC3 5456 bytes
SHA-256: 033ba1710ef13d81fe356a691caf02a245b087f659c48af4ba618a63d84eaa3a
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 10608 bytes
SHA-256: 0e2a909a68f201578580dbd799c36a33c8b233a330ec51672056ae8f0a0e250b

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