Malicious PDF — malware analysis report

Static analysis result for SHA-256 785e00f37b3fa496…

MALICIOUS

PDF

70.4 KB Created: 2021-02-18 13:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 95acefeee721d074fdd9285d9e1b4d6c SHA-1: bcbf945628ef7316966dffa0f32ee7a745684414 SHA-256: 785e00f37b3fa4962108cbd838302f4c791874aa370525a423254e091467f5ca
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded content, though obfuscated, appears to be a lure related to chainsaw sharpening, which is then used to redirect to potentially malicious sites.

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://jottigo.ru/strik?utm_term=what+angle+to+sharpen+a+chainsaw+blade PDF link annotation
    • http://aov.one/zusefoparebni75.pdfIn PDF document text
    • http://onlineeshop24.xyz/canyon_ultimate_bb_cable_guidev72h7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_5fd11ab8c50e0.pdfIn PDF document text
    • http://getchambre.xyz/paluwagemakemizuvugakuj7fhx.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/2Vgdtgj/89305953168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_5fd64fac6f5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5fd68db99f65a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fd726518e8b9.pdfIn PDF document text
    • http://batut.space/what_is_the_theory_of_falsificationn2qzn.pdfIn PDF document text
    • https://dipidedi.weebly.com/uploads/1/3/2/8/132815933/lepuxewikig.pdfIn PDF document text
    • http://itsamorem.com/59094643942ottyt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_6007297e2a956.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/donukadizolin/shutter_aperture_iso_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/chutkule_hd_video.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

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_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 5580 bytes
SHA-256: b9642cf939e840ffe04274926f34b584271b0e782d4ec91888a18e47b90b89ca
font_01_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 10260 bytes
SHA-256: 41cad1de745143cb4101ab14ac152e80e6381674e1ebab71674f8cb22aa8e9a1

Open this report in the interactive analyzer, or submit your own file for analysis.