PDF malware analysis — malicious · 4a88b282f61c710d

MALICIOUS

PDF

111.4 KB Created: 2021-01-23 22:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 0e49e76cd8e9edef6d117b02732e6031 SHA-1: cb44eaa77e0a6ee194253dcc66e4c6d206fbac41 SHA-256: 4a88b282f61c710dc7786c59a19548c1f0f8357fa4453cdaf4232ebaa941cc77

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one pointing to 'traffking.ru', a known malicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution via the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://traffking.ru/123?utm_term=99+ranch+market+hours PDF link annotation
- https://site-1178858.mozfiles.com/files/1178858/factoring_trinomials_practice_worksheet_with_answers.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366050/normal_5feafeee8d09d.pdfIn PDF document text
- https://site-1174433.mozfiles.com/files/1174433/38323297069.pdfIn PDF document text
- https://site-1168287.mozfiles.com/files/1168287/doctor_fields_list_and_salaries.pdfIn PDF document text
- https://site-1180330.mozfiles.com/files/1180330/microsoft_teams_for_mac_not_working.pdfIn PDF document text
- http://puzotupisebi.66ghz.com/8394719192.pdfIn PDF document text
- https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/1389580.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490739/normal_5fd5f5b65183e.pdfIn PDF document text
- https://site-1181071.mozfiles.com/files/1181071/78102761756.pdfIn PDF document text
- https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/limajuvivezasukoxane.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458840/normal_5fe1a69aae897.pdfIn PDF document text
- https://site-1178449.mozfiles.com/files/1178449/switzerland_english_language_assistant.pdfIn PDF document text
- https://site-1166620.mozfiles.com/files/1166620/80344397473.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444657/normal_5ffbd4e8191c1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://sajipesexadagon.epizy.com/gimuratazufogisodutudi.pdfIn PDF document text
- http://laganomezavarof.epizy.com/84064371981.pdfIn PDF document text
- http://rojapaj.epizy.com/pokinuredigemi.pdfIn PDF document text
- http://bususetut.epizy.com/whatsapp_status_video_sad_2019.pdfIn PDF document text
- http://wekameti.rf.gd/nasafipajovigixipomegexus.pdfIn PDF document text
- http://bibalaluroxute.epizy.com/vaaste_song_mr._jatt._com.pdfIn PDF document text
- http://ribaxekag.epizy.com/secondary_alveolar_bone_grafting.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off00017a94.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x17A94	29072 bytes
SHA-256: `3da5b738623d2c103271e1e071ee7ae1a0583cff60b401fd16125005be22bf13`
`font_00_sfnt_off00012680.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12680	7792 bytes
SHA-256: `92526564ecd213113bb1e9d73ea6b9fc8b4da724316b1de91d17b3a1948b720a`
`font_01_sfnt_off00014037.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14037	5132 bytes
SHA-256: `4a0a810cfa21a84cddab4a07f6916491ee990c2b36eb3f342af47ac4dc558a32`
`font_02_sfnt_off00015177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15177	13260 bytes
SHA-256: `51823883c68514c9145fbad4283dced4b320d44daba2fe8d54818b0fe8c0aeb1`

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