PDF malware analysis — malicious · 84f13e511ef9bad5

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 04:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 266c393c82d5029ec976747df86af6f3 SHA-1: 3be21d87417d861e894312db81b9686750433ea3 SHA-256: 84f13e511ef9bad51e599f2a42465aac5c0114bba9b6f1e7b9f8aaeef488fd58

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically appearing as a lure for 'fundamentals of economics textbook pdf', suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of hosting numerous links on disposable domains, reinforcing the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://kuzutuzo.ru/award?keyword=fundamentals+of+economics+textbook+pdf PDF link annotation
- https://cdn.sqhk.co/sabiseleto/Rhhtoje/jexewavisevawewudelevu.pdfIn PDF document text
- http://trysol.xyz/twas_the_night_before_christmas_poem_full_textlfpwd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369522/normal_604a994cbfa93.pdfIn PDF document text
- https://cdn.sqhk.co/lewonuvaxu/gSgjUgc/19621744115.pdfIn PDF document text
- https://cdn.sqhk.co/voxedifi/cLggczr/bleacher_report_liverpool_fifa_19.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466151/normal_5ff61b20cb4d9.pdfIn PDF document text
- http://bofoduweb.22web.org/razagixavuganinudutamelu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424024/normal_6039dbc634d00.pdfIn PDF document text
- https://cdn.sqhk.co/remozemot/e2ii83y/dental_assistant_programs_mn.pdfIn PDF document text
- http://marketitaly.info/marvel_movie_marathon_order_by_release_datecqbsv.pdfIn PDF document text
- https://cdn.sqhk.co/lovaxixifew/TggjfOA/psoriasis_symptoms_and_treatment.pdfIn PDF document text
- https://cdn.sqhk.co/vobilurerire/jeibhhC/26417888483.pdfIn PDF document text
- https://cdn.sqhk.co/fezavomol/m6cPpqy/letetisojuxo.pdfIn PDF document text
- http://natlab.ru/salexokitamifuzuwum6n2x4.pdfIn PDF document text
- https://cdn.sqhk.co/jotapepikota/h8Njdhi/tank_stars_hack_ipa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377377/normal_5fece805ce4f8.pdfIn PDF document text
- https://cdn.sqhk.co/mujexoxa/8Phghjv/download_super_rally_racing_3d_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/penomufepuk/5j7Y6DL/nimixuw.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://s3.amazonaws.com/novifamigot/are_harbor_breeze_light_kits_universal.pdfIn PDF document text
- https://s3.amazonaws.com/piradi/bufufojazijibadis.pdfIn PDF document text
- http://rowavironipomiz.epizy.com/singer_sewing_machine_manual.pdfIn PDF document text
- https://s3.amazonaws.com/juvuraguvutoxif/aankhen_serial_full.pdfIn PDF document text
- https://s3.amazonaws.com/tipikaxe/jonepewidutiwibewiti.pdfIn PDF document text
- http://dinixebun.epizy.com/49077940660.pdfIn PDF document text
- http://vodipofasofuf.rf.gd/aaaah_movie_in_hd.pdfIn PDF document text
- http://webowoj.rf.gd/23974946774.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_off0000ed65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED65	5316 bytes
SHA-256: `0e867530e705b4ad9fe8674a7197fc030d22371bcef0b0de1b4ef515424259b6`
`font_01_sfnt_off0000ff63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF63	10844 bytes
SHA-256: `0f68229b2571507bc8289c0c88543cfd3782e4ef0d3b78af7aaa4d7259c86d21`
`font_02_sfnt_off0001247d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1247D	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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