Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdd32487426a6d1…

MALICIOUS

PDF

77.4 KB Created: 2021-03-28 05:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0feeae91cefc62ec956ef234ceb0244e SHA-1: ac75cc7245fba2bf2e49aed0a0abaef70cb350ca SHA-256: 8cdd32487426a6d1d12a6a428433c83957d0d11804948908c902ad37f7038c7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a deceptive title mimicking a search query about contacting a Facebook Marketplace seller, directing users to a suspicious URL. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://pelibifir.ru/strik?utm_term=how+do+i+contact+a+seller+on+facebook+marketplace PDF link annotation
    • https://cdn.sqhk.co/genizataxom/heribMc/practice_makes_it_perfect_quotes.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/85365132006.pdfIn PDF document text
    • http://nowanedilado.22web.org/mubof.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/JidCSl2/pathogenic_organisms_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pumurugo/jfibiLC/ant_family_structure.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/8geieRg/ms_mechanical_engineer_salary_in_us.pdfIn PDF document text
    • http://dujifasuda.iblogger.org/wufuk.pdfIn PDF document text
    • http://notojubemeduxan.iblogger.org/zogaromelirog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2d8b420c-d783-40af-aff7-3e9c0292095f/97653934208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca30880d-4f39-4755-a499-51cf8b71a3c5/daniki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c740a4-4196-4ae3-9fa0-e9d656b00c3d/how_to_buy_a_car_privately_victoria.pdfIn PDF document text
    • http://nunivigel.epizy.com/59886565571.pdfIn PDF document text
    • http://maladovefo.rf.gd/tobesisamadumibokupo.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/2230021061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96a0b4f-9edc-46e7-ae1d-50fa0364934d/meweka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ad156d-a1fc-4b20-9a9f-64e423b6e145/mansions_of_madness_2nd_edition_monsters.pdfIn PDF document text
    • http://nononon.epizy.com/nutivax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9a59ae-32ee-4f5e-a948-7446c5ec6e8e/46191091660.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/70865331805.pdfIn PDF document text
    • http://zagebixomibolo.rf.gd/8792706547.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 5348 bytes
SHA-256: bc659ccd71435b4d2bf2c7de0ac9919aa5935ecaff60fb5d19756b7e9796065e
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 10592 bytes
SHA-256: b1805a91d4a8695795f7308d54d67b83daacd02f1265be6e62c6e9481f849eb7
font_02_sfnt_off000119c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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