PDF malware analysis — malicious · cf46bc269f8f0b1b

MALICIOUS

PDF

101.0 KB Created: 2021-09-09 12:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 1153a527a462b034aba3912a1a4c66d7 SHA-1: ef097786c64c0ca6d3c12351ba99939878ef087f SHA-256: cf46bc269f8f0b1bcffadab843066e5c57cd6a8f3f9e90e38a910fba83a984b2

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'pixomot.ru' with a 'bank pasargad android app' UTM term, suggesting a phishing lure. The PDF also functions as a link farm, redirecting to multiple domains, which is a common tactic for distributing malware or conducting phishing campaigns. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

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://pixomot.ru/uplcv?utm_term=bank+pasargad+android+app PDF link annotation
- http://transbur.ru/admin/ckfinder/userfiles/files/dudipemojufesuje.pdfIn PDF document text
- http://odpadykj.cz/UserFiles/File/koperizemaz.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395c272d351---fatarodosejutaxes.pdfIn PDF document text
- http://toptoptraining.ru/img/upload/file/42635895844.pdfIn PDF document text
- http://cafegreenwichvillage.com/uploads/files/78574676234.pdfIn PDF document text
- https://kaptenhoki.net/contents/files/68841791032.pdfIn PDF document text
- http://marketypik.pl/zdjecia/fck/file/bikazubes.pdfIn PDF document text
- http://jullien38.com/ressource/site-image/files/44507676719.pdfIn PDF document text
- https://almoheetmanpower.com/public_html/userfiles/file/34789720889.pdfIn PDF document text
- http://valentine.tutaylamhet.com/storage/ckfinder/files/vejukazodemoxoguwatofepi.pdfIn PDF document text
- http://15449010.com/FileData/ckfinder/files/20210909_1581A631861E1D93.pdfIn PDF document text
- https://thehideawayresortpattaya.com/userfiles/files/91591110844.pdfIn PDF document text
- https://cfacgroup.com/uploads/FCK_files/file/73824231917.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134557d1ade1---tarukedafevizafabimopirot.pdfIn PDF document text
- https://publicbridge.pl/userfiles/file/80238109075.pdfIn PDF document text
- http://historia-bfured.hu/userfiles/file/10330300636.pdfIn PDF document text
- https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/delazufelefadonug.pdfIn PDF document text
- http://teplorium.su/userfiles/file/17835623999.pdfIn PDF document text
- http://www.jysunshine-hotel.com/up_files/file/vevetugepafineromapibe.pdfIn PDF document text
- http://somsit.com/ckfinder/userfiles/files/tigavuti.pdfIn PDF document text
- http://ttmplus.com/userfiles/files/vixosoxodabitif.pdfIn PDF document text
- http://nationshield.ae/userfiles/files/60687748081.pdfIn PDF document text
- http://deborahkay.com/ckfinder/userfiles/files/gikisutudukukoz.pdfIn PDF document text
- http://stellar.ru/ckfinder/userfiles/files/zufipilotugesakarunivox.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_off0001245a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1245A	10436 bytes
SHA-256: `7b70290949508d8d1861fd606bf0e54c3e03bf6e9aa64ded7887144f4278464d`
`font_01_sfnt_off00013be1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BE1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000153f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x153F3	19140 bytes
SHA-256: `8a158e9469be296554304ef4b25b113bf3cef7ac5b5ebd933f9c0ca715ebc76a`

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