PDF malware analysis — malicious · 26303470ce64ba5d

MALICIOUS

PDF

116.7 KB Created: 2021-03-08 17:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: ef2c2e5dd7682dc5c99cfec4301f8006 SHA-1: e672b3d1c80fa9dfaeba532cefadbbb74a113171 SHA-256: 26303470ce64ba5dbc9fe7d7c7465f46b6d2188ed5a620df93f2edbacb12a316

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or malware downloads. The PDF_SEO_LINK_FARM heuristic specifically highlights the presence of a large number of external links, many hosted on disposable domains, suggesting a tactic to distribute malicious content or redirect users to fraudulent sites.

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://baarspo.ru/123?utm_term=analog+and+digital+integrated+circuits+notes+pdf PDF link annotation
- https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/4807837.pdfIn PDF document text
- http://saporik.scienceontheweb.net/java_swing_button_icon.pdfIn PDF document text
- https://siwepuxerit.weebly.com/uploads/1/3/0/7/130775843/nutizalekefuzopak.pdfIn PDF document text
- https://zatuzura.weebly.com/uploads/1/3/1/4/131453499/80d17b7199282.pdfIn PDF document text
- https://cdn.sqhk.co/pigajifaw/8icgh6o/groove_life_silicone_ring_review.pdfIn PDF document text
- https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/8987053.pdfIn PDF document text
- https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/cde723dde.pdfIn PDF document text
- https://nobakunifiximup.weebly.com/uploads/1/3/5/3/135310199/6422622.pdfIn PDF document text
- https://cdn.sqhk.co/janonaset/xhgjhif/29895382941.pdfIn PDF document text
- https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/226a735e5b1.pdfIn PDF document text
- http://detelibizonibi.22web.org/angular_formdata_upload_multiple_files.pdfIn PDF document text
- https://cdn.sqhk.co/potasuregoz/iJih9jf/download_ultimate_offroad_simulator_mod_apk.pdfIn PDF document text
- https://tirevenisigagum.weebly.com/uploads/1/3/4/5/134500803/4479349.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_afb8aa735cb546a099ba5cf99a291ebe.pdf?index=trueIn PDF document text
- https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_521424bd684d45a99414ce69e6f578b0.pdf?index=trueIn PDF document text
- http://lipabarud.atwebpages.com/38476091687.pdfIn PDF document text
- http://xurosuforudev.atwebpages.com/7021898832.pdfIn PDF document text
- http://nisetekotixob.myartsonline.com/fekev.pdfIn PDF document text
- http://jewobadal.epizy.com/gilapeti.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000177e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x177E0	3236 bytes
SHA-256: `bb8060a3e8886af84aadedf3ec59e7ba974e2208a702e3122e31d0d0df413f47`
`font_01_sfnt_off000184d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x184D5	5312 bytes
SHA-256: `e1bb3926e9892dfe497e9b0d2bc63370fa579150d3595fd863a8564c5c6a9593`
`font_02_sfnt_off000196f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x196F7	13164 bytes
SHA-256: `5753334cbde66ac74f61391e92992602ba4bde61557f8fd24d0d1bcfb03be4b4`

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