PDF malware analysis — malicious · b01644b6f18dbe1f

MALICIOUS

PDF

83.1 KB Created: 2021-04-01 05:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 44b51806db269a635dfa207c91ee1375 SHA-1: 9d319113805cebe5c3f453c0e722025939ade60d SHA-256: b01644b6f18dbe1f1500ef8f23296179d8d19686157832468e760b3fbaa86fda

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous external URIs, with one specifically pointing to a URL that appears to be part of a link farm designed for SEO manipulation or to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics suggest the primary goal is to redirect the user to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=sat+subject+test+math+2+answer+sheet PDF link annotation
- https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/mutotokosikoda.pdfIn PDF document text
- https://cdn.sqhk.co/kagalitisup/jiaibgj/offline_voice_assistant_for_android_download.pdfIn PDF document text
- https://govuvafokixer.weebly.com/uploads/1/3/1/6/131607022/55a783.pdfIn PDF document text
- http://netekepipavosis.sportsontheweb.net/nc_youth_employment_certificate.pdfIn PDF document text
- https://cdn.sqhk.co/ropobemuma/uCgccvB/color_jumpsuit_shorts.pdfIn PDF document text
- https://fobamenowukar.weebly.com/uploads/1/3/4/4/134485242/vilakijomofutibewa.pdfIn PDF document text
- https://xonokuraku.weebly.com/uploads/1/3/3/9/133988937/00939b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418575/normal_6065020bb9204.pdfIn PDF document text
- http://roxedizusugu.mywebcommunity.org/mavanirokodis.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393348/normal_6025e21092133.pdfIn PDF document text
- http://sakivometo.medianewsonline.com/87892792379.pdfIn PDF document text
- http://fumumowovufa.mywebcommunity.org/18645956290.pdfIn PDF document text
- https://cdn.sqhk.co/suzeboxiwo/eW14Qif/download_game_god_of_stickman_3_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/niwonosorude/ieetbgd/water_parks_in_ohio.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403271/normal_600fd96003897.pdfIn PDF document text
- http://kulefinimujaleg.iblogger.org/program_tv_remote_to_roku_stick.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/63e25624-db15-4107-b820-83a80fc5b8cc/how_to_learn_chinese_in_five_minutes_joke.pdfIn PDF document text
- http://vogumogut.epizy.com/nazegatevav.pdfIn PDF document text
- http://godubaxedija.rf.gd/31306594176.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/20fcdadb-35f9-44e2-aeff-6b134a51ebdc/whirlpool_gold_refrigerator_replace_ice_maker.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a42770eb-2c17-4beb-983d-28bfe7ed1471/bushnell_laser_rangefinder_yardage_pro_sport.pdfIn PDF document text
- http://fanalejowegop.atwebpages.com/korean_childrens_stories.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84374170-9e1f-49e0-8d8c-069b3789b2fe/wibenuvidiraso.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_off0000f78a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF78A	2932 bytes
SHA-256: `6103831ea556ddf4c438b48d3c06e4e656ccb2b00f416bcad1ef6c414c4a439e`
`font_01_sfnt_off000101f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101F5	5552 bytes
SHA-256: `1682947c6657a4663b0dde1a78272690ea837c586a01350ba5961829e4849e3d`
`font_02_sfnt_off000114c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114C2	12228 bytes
SHA-256: `af616f0d5fc95a683f8f8d7734e972f7f1dd95d77058fa93765cd8bafbba13ea`

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