PDF malware analysis — malicious · e0ecf05b9a13479e

MALICIOUS

PDF

141.8 KB Created: 2021-03-19 08:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 1643a47a4589dae7128394eb763bbe60 SHA-1: 283c0d6dcfe21ad15854642501b10c023ff082ca SHA-256: e0ecf05b9a13479e3f7a1f60bd1c5d63644dd9a71408a90cb6466e9333ca9dfa

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the heuristics suggest the document's primary purpose is to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://ponafet.ru/strik?utm_term=define+mathematical+proof+in+maths PDF link annotation
- https://cdn-cms.f-static.net/uploads/4379035/normal_6037a95268601.pdfIn PDF document text
- http://nofowopomi.iblogger.org/rulolabiwo.pdfIn PDF document text
- https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/569df53.pdfIn PDF document text
- http://pexiwaz.iblogger.org/sedotudapekoxe.pdfIn PDF document text
- https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/werugepikafobaxiware.pdfIn PDF document text
- https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/515c41a.pdfIn PDF document text
- https://rirosivipoxutu.weebly.com/uploads/1/3/2/3/132302830/kinirusejodeka.pdfIn PDF document text
- https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/jatugabanokoxe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386849/normal_601bfde69a2a0.pdfIn PDF document text
- https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/zifam.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455195/normal_6028a1db93e0b.pdfIn PDF document text
- https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/xojajemubu_sopopej_forasinozo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457311/normal_6027b34044908.pdfIn PDF document text
- https://mojebope.weebly.com/uploads/1/3/4/6/134609081/2835108.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/ec600d95-5d85-440e-8848-c64984131e5d/25920913797.pdfIn PDF document text
- http://jumezezufa.rf.gd/what_is_short_story_in_cebuano_literature_brainly.pdfIn PDF document text
- http://rodaselawowov.rf.gd/photoshop_free_windows_10.pdfIn PDF document text
- http://pesogulovuxolub.rf.gd/67222128935.pdfIn PDF document text
- http://junorijuzijipu.rf.gd/7025995601.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4c410b6b-2e59-464c-9509-fec1db772421/gamalivalugezegabomun.pdfIn PDF document text
- http://bekabugi.epizy.com/darkest_dungeon_party_building_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/07d718eb-64fb-4bc2-ae6f-89ab67001184/verbos_en_ingles_y_espaol_para_nios.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd85a6fe-90bb-47a0-9efc-69ef8c84b9ae/gikisux.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0001c472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C472	5252 bytes
SHA-256: `b19e5edd788fc36024d490d8572755e6bb8e3bc072393fce5cd8f660686a82c6`
`font_01_sfnt_off0001d627.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D627	21520 bytes
SHA-256: `140e2468847ebbd98913c39ee6f39df7b7cec2e7502a26cc6ca06080b5ce8bcd`
`font_02_sfnt_off000211e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x211E9	16296 bytes
SHA-256: `f5ed1daec0e95994f406aede404335913fd77b83e25a07268ce5c03b9c81f6ae`

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