PDF malware analysis — malicious · bac669cbd47d2c0e

MALICIOUS

PDF

95.2 KB Created: 2021-03-21 21:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 02d58382a8820d1d3ff39d624054709d SHA-1: d70131e62d30d4ad39d295bb9ad6a3b6936bfa08 SHA-256: bac669cbd47d2c0e550167babd432827f41445edf8aa4cb55aca6b1dab432930

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to disposable domains, indicates a link farm designed to redirect users. The primary URL, https://fokemale.ru/123?utm_term=absolute+value+inequalities+activity+pdf, is likely part of this redirection scheme, aiming to lead users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=absolute+value+inequalities+activity+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4489237/normal_604b2cb36816d.pdfIn PDF document text
- http://dobilarujokux.sportsontheweb.net/agrifarm_utto_mp.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457279/normal_6014653c58f85.pdfIn PDF document text
- http://centerverifybadge.com/724863974751tx7y.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367622/normal_5fcafc056fb9c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366989/normal_602c1ebc1ed49.pdfIn PDF document text
- http://podarokinsta24.online/watch_a_quiet_place_123movies1mppi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448995/normal_6026d13015417.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/f65adb06-2654-4ec2-a38d-57041071c679/wixebijanimesixoxupid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/722038f0-6293-4bcd-a702-6355cfa5350c/zadibefufunuxatedotagebu.pdfIn PDF document text
- http://bixozebaxikapos.atwebpages.com/22663994196.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/17c119f6-33c8-41b5-8d4b-8d47e9984e83/15012171183.pdfIn PDF document text
- http://miwewugewu.atwebpages.com/19459745129.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c9ec42ad-b4a0-4ba7-a393-4ef1c0366711/4730116096.pdfIn PDF document text
- http://sodowurivav.onlinewebshop.net/casa_luis_barragan_planos.pdfIn PDF document text
- https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_4a6865dc72574481b3197d84bb9e0892.pdf?index=trueIn PDF document text
- https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_1e34b22558114c1b982c406b3a2db7af.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/46b42c7e-6c0a-48d1-98ec-b8d95b2eba5b/matemtica_financiera_inters_simple_y_compuesto.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_off00011fe6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FE6	5468 bytes
SHA-256: `f3ea2a02c9b25105c9e8e02ef4c1e683f2eb227f93b85deb6b5346513523e67f`
`font_01_sfnt_off000132a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132A2	11824 bytes
SHA-256: `3ba512ea1190166fe24b7e207dfd0755a3338144ff555d241da8ce278064ff42`
`font_02_sfnt_off00015a4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A4F	16148 bytes
SHA-256: `51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04`

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