PDF malware analysis — malicious · 6a8449aecb9ab9a6

MALICIOUS

PDF

77.1 KB Created: 2021-01-23 00:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 5c18f6c9ccd1cac8150013213a4950ad SHA-1: e0a4b6f9cec316c3f72362e1197d312eed728fe2 SHA-256: 6a8449aecb9ab9a6e10d830fbb1404368db5464f613e51351b5e97d90976e4e8

206 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, indicative of a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of numerous external links, many hosted on disposable domains or services like Weebly, points towards a campaign designed to generate traffic or distribute further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://traffine.ru/123?utm_term=things+fall+apart+essay+questions+and+answers+pdf PDF link annotation
- https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/milepunuxudeva-bamijapajar-gifeli.pdfIn PDF document text
- https://natumelazorog.weebly.com/uploads/1/3/4/7/134711419/2663584.pdfIn PDF document text
- https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/fugop_riwibisupasoku_popitezo.pdfIn PDF document text
- https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/zenoleligevela.pdfIn PDF document text
- https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/xusezup_devonuferosimoz.pdfIn PDF document text
- https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/xupigesuz.pdfIn PDF document text
- http://padugozerur.22web.org/xidanadizu.pdfIn PDF document text
- https://vimiwakemimug.weebly.com/uploads/1/3/1/6/131606159/759718.pdfIn PDF document text
- https://safalijig.weebly.com/uploads/1/3/1/0/131070993/vepovogokefa.pdfIn PDF document text
- https://vibisorimujeke.weebly.com/uploads/1/3/4/3/134344086/650ec81.pdfIn PDF document text
- https://jibukosixej.weebly.com/uploads/1/3/4/0/134018053/fomidabafukis.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://taxisariwoboduz.epizy.com/55065015264.pdfIn PDF document text
- http://gizogebinide.rf.gd/datoxate.pdfIn PDF document text
- https://s3.amazonaws.com/nafibanefexex/airbnb_cereal_app_font.pdfIn PDF document text
- http://nuvujudidasutem.rf.gd/spreadsheet_for_household_expenses_uk.pdfIn PDF document text
- http://sarozaxag.epizy.com/15550628628.pdfIn PDF document text
- https://s3.amazonaws.com/makumapikeze/23716281906.pdfIn PDF document text
- https://s3.amazonaws.com/dugibabafod/rokijexurodod.pdfIn PDF document text
- http://tekunobujolid.epizy.com/muzavirosixoxife.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0E9	5572 bytes
SHA-256: `946896eb02ec8b8d4888bd580284cb76c44f9c70909d37be23883d6fed281c72`
`font_01_sfnt_off000103ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103EC	10180 bytes
SHA-256: `ece16a5f3663759489e9b714841efa7c03bfef79535f676bb10cf3efd74c1baa`

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