PDF malware analysis — malicious · 1ba893225a8b5cf4

MALICIOUS

PDF

85.1 KB Created: 2021-10-07 04:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: c74205b435808566799d5dbafd91636c SHA-1: e71c14ea8213846ce3909dbeafe9be1cde668455 SHA-256: 1ba893225a8b5cf42d1d5f91e094690ffbc2e1e46e02d995553fd9b17233910f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm or redirecting to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate effort to obscure the final destination, typical of phishing or malware distribution campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's used as a lure to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://infrive.ru/uplcv?utm_term=70+462+questions+and+answers PDF link annotation
- https://mar3ol.com/Files/files/gunezerupesiputavusejis.pdfIn PDF document text
- http://carsonpokebar.com/uploads/files/wanon.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/gogareno.pdfIn PDF document text
- https://harmony-lazienka.pl/Upload/file/zavuxake.pdfIn PDF document text
- http://tokyosushilohaus.com/uploads/files/13147681449.pdfIn PDF document text
- http://hoteldanang.com/uploads/images/files/41740197807.pdfIn PDF document text
- http://hycxchina.com/filespath/files/20210905183013.pdfIn PDF document text
- http://geologicatoscana.eu/userfiles/files/zazoz.pdfIn PDF document text
- https://safetypadlocks.eu/eurostyl/photos/file/jetituw.pdfIn PDF document text
- https://fresh-cherries.com/ckfinder/userfiles/files/gatorejemovomazawoz.pdfIn PDF document text
- http://asustainable.com/global/file/330656657.pdfIn PDF document text
- http://sergeybazarov.ru/file/favukeseleruweje.pdfIn PDF document text
- https://home-consult.lu/userfiles/files/66807010501.pdfIn PDF document text
- https://khanikango.in/file/14354552895.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/wokibevagipojur.pdfIn PDF document text
- http://ficfart.org/userfiles/file/vemoxujadilaluso.pdfIn PDF document text
- https://motiwalainstitutes.org/userfiles/file/nogimanuvobezob.pdfIn PDF document text
- https://slavicchurchmississauga.com/fck_upload/file/somubogefojake.pdfIn PDF document text
- http://madinaboys.com/easydo%20v2.00/files/uploads/13611566120.pdfIn PDF document text
- https://www.sophrologue-nimes.fr/upload/news/files/xexaw.pdfIn PDF document text
- http://lepetitjaunais.com/userfiles/file/98320119466.pdfIn PDF document text
- http://arsvet.ru/img/upload/natifiberuvodokul.pdfIn PDF document text
- http://gocep.org/data/userfiles/files/29858072120.pdfIn PDF document text
- https://keongracun.org/contents/files/34696807213.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e554.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE554	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD6B	10968 bytes
SHA-256: `74b0430fa02f25ba94f1f023490a83c0a9e20883e9e797d3ef80fb6cb5cd3c1a`
`font_02_sfnt_off00011709.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11709	18152 bytes
SHA-256: `4a57a0ef1dc642a0db2fe594e2ba8159cd06edd2817481945b477108eba3c307`

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