PDF malware analysis — malicious · fc24242a6c97a4ad

MALICIOUS

PDF

99.3 KB Created: 2021-03-14 04:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 9cff494e19c498c1fff5ea2f1703cc1a SHA-1: a73cb412eee0cc8fd9b32fe98ba4efb2eb5ea694 SHA-256: fc24242a6c97a4ad558f1bd144c4e5f4844045108fb2e6a16b620a69ee6108f5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with at least one pointing to a domain associated with malicious activity (baarspo.ru). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. No scripts were extracted, but the presence of external URIs and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/wb?keyword=world%20map%20continents%20worksheet PDF link annotation
- https://cdn.sqhk.co/merabuvi/lifNJje/22033123194.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372740/normal_5fd9691778721.pdfIn PDF document text
- https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/5693400.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485926/normal_5fe151192deb7.pdfIn PDF document text
- https://cdn.sqhk.co/pesuxigu/wjhVYcx/christmas_party_invitation_template_word.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500201/normal_602409c923b70.pdfIn PDF document text
- https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/19f91a.pdfIn PDF document text
- https://cdn.sqhk.co/nozedimasav/hdloZpi/luxubesomuzikog.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443325/normal_6004107417ab4.pdfIn PDF document text
- https://cdn.sqhk.co/ligumorik/2igNhc7/bike_racing_unlimited_game.pdfIn PDF document text
- https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/3069589.pdfIn PDF document text
- https://xibomuwupipufa.weebly.com/uploads/1/3/5/3/135389044/vigasebenuzetisurode.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413982/normal_5fdcfbb7879a1.pdfIn PDF document text
- https://cdn.sqhk.co/zonurubo/KEhcRmv/all_star_basketball_game_scores.pdfIn PDF document text
- http://vudujupuboneg.22web.org/zilododaru.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://rojavaluji.rf.gd/65060491903.pdfIn PDF document text
- https://s3.amazonaws.com/rezugekolaba/what_is_the_best_hand_warmer.pdfIn PDF document text
- http://jilubur.rf.gd/50500224682.pdfIn PDF document text
- http://jigategire.epizy.com/dr._jekyll_and_mr._hyde_1931_ok.ru.pdfIn PDF document text
- http://lokemuwebofeg.rf.gd/bolevufegefanivejuzevuwux.pdfIn PDF document text
- https://s3.amazonaws.com/pevuwarobuvowa/12405922928.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012501.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12501	5480 bytes
SHA-256: `f8e599741bb96d4f7d299388f2398a8e1b82135c5d07b4c756640cb6278a267a`
`font_01_sfnt_off00013782.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13782	1800 bytes
SHA-256: `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`
`font_02_sfnt_off00014010.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14010	11896 bytes
SHA-256: `d10703264fb05ba22cf13db5f0d0a9f47f102ffbb3d0a47ce48c34ca839ff12e`
`font_03_sfnt_off000168c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x168C6	16112 bytes
SHA-256: `a4790eb4f6d4154bf27b37f3c17bff3199b0e620de062e7f5c148da0cd1c657b`

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