PDF malware analysis — malicious · 76870f7e292d4bc4

MALICIOUS

PDF

184.4 KB Created: 2021-04-17 19:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 3003ca2e36ae4e2e658e83cfd90a7875 SHA-1: 5c1e0a647f4093e2bf45e0e6cefa83ab3c02d129 SHA-256: 76870f7e292d4bc46dff51c16b4a0084b38ed2961af56f5d81670b804981d97d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://golowaki.ru/strik?utm_term=biblical+definition+explanation PDF link annotation
- http://confirmyourverifiedbadge.com/pang_abay_na_kundisyunal_worksheets8ekuf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368736/normal_6054fa0291059.pdfIn PDF document text
- http://grigolia-studio.ru/cyberpunk_2077_never_fade_away_find_the_mainframeao9ch.pdfIn PDF document text
- http://poroda.site/3d_printed_house_cost6swxy.pdfIn PDF document text
- https://kenuvibugitevam.weebly.com/uploads/1/3/4/7/134700053/7133383.pdfIn PDF document text
- https://nibebelijatod.weebly.com/uploads/1/3/1/4/131452937/6644312.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377902/normal_5ffcaa4cbffae.pdfIn PDF document text
- http://apkweb.net/compare_and_contrast_romanesque_and_gothic_architectureh7b72.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390081/normal_6005173a499d4.pdfIn PDF document text
- http://garant-ritual.online/arduino_and_raspberry_pi_projects2juc3.pdfIn PDF document text
- http://devgame.design/american_historical_events_1900s5t4bz.pdfIn PDF document text
- https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/detikovazowikil.pdfIn PDF document text
- http://tryici.xyz/2592819835q4mt3.pdfIn PDF document text
- https://dosogomufafana.weebly.com/uploads/1/3/2/6/132696174/d17ec44867793d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412382/normal_602ca3f96cda4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392864/normal_5fc7fb700463e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485153/normal_606e188e8ef3c.pdfIn PDF document text
- http://gtmedis.com/47224396718hyxjp.pdfIn PDF document text
- https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/9099878.pdfIn PDF document text
- http://kushtanash.ru/vaboruji7vl9k.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://d9c73feb-c945-4d97-9d44-ff62a4b57c47.filesusr.com/ugd/12056e_b0b89b74549d440a9677440933e065c2.pdf?index=trueIn PDF document text
- https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_50d09dba802142c6a7ca6119f1fd1b42.pdf?index=trueIn 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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00025694.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25694	4920 bytes
SHA-256: `6c0edb57bad0ca2e15c80e6ee7bdf27b230024a14399403911234e0d6c0b2543`
`font_01_sfnt_off00026752.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x26752	27576 bytes
SHA-256: `611c42e6aa2638b44c08f74bb13ae1f280a5a59fc284dfd19d760e2e3aada07a`
`font_02_sfnt_off0002b0cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B0CF	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`
`font_03_sfnt_off0002be92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BE92	7388 bytes
SHA-256: `9c5816f7b197af9e9d079f9aead25649f5b1479b1d252b7117438f439a489942`

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