PDF malware analysis — malicious · d697ca22a162aae6

MALICIOUS

PDF

547.3 KB Created: 2021-07-14 06:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 992c567a06270c0025cdd242394f0e12 SHA-1: 741976d161a2b426582a218fb5de8199723a598d SHA-256: d697ca22a162aae6d22e929d4afbcabb00993f9b76f504dd3b5d05f45eb7657d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a compromised WordPress upload directory, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.8019

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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://rugsinc.in/UserFiles/files/49125086421.pdf In PDF document text
- http://mellorymotors.ru/admin/ckfinder/userfiles/files/zewulufusukilusobuzipa.pdfIn PDF document text
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d6f16019e27a4b8022dcf7a8df0cab40/konaj.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce59d596a7---gututamopiboroxewufugubi.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/agu5cl8hbhabbekfffs7ahcj71/gujabamijobafuxaxajav.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/72f5d30371ceed9bce51acd640727ff3/tutul.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ff141b51c842071084b0fe45e9a1d755/kudebawopeguzodok.pdfIn PDF document text
- http://smflow.in/admin/uploads/file/98184252459.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/51hl67cmpggr5injgv5m5qr482/telabefobupogufuwinug.pdfIn PDF document text
- http://gocep.org/data/userfiles/files/80830530477.pdfIn PDF document text
- http://www.ujepites.hu/userfiles/files/51347903145.pdfIn PDF document text
- http://bualuang101.com/backoffice/upload/files/26653857253.pdfIn PDF document text
- https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/b48jvvth19b3nmogj8r3p10jb1/59199538815.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10160bee1c---60561381649.pdfIn PDF document text
- http://alpha-th.com/userfiles/file/gezuzowadenarabazutedili.pdfIn PDF document text
- http://ei-windykacja.pl/upload/file/sodizitapid.pdfIn PDF document text
- http://khangvietdn.com/uploads/file/4322592874.pdfIn PDF document text
- https://travelinnsuites.com/nbloom/fckuploads/file/zuxof.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f40a37b7dd---99037451349.pdfIn PDF document text
- http://chupanhnoithat.vn/upload/files/kakukovibovomabunojareri.pdfIn PDF document text
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/k2a5va1srod999qihhbpi34ikl/wuluriweridiwe.pdfIn PDF document text
- http://digifast.cz/userfiles/87016446020.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/rf7vjiq0a5snvbg52h9bh1k30d/varusekovuzalirabefarusam.pdfIn PDF document text
- https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ppna5v732ipq3hvm1ugos3ciou/kopimimaderomoderimewu.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/947af9fb51527d039dfa3ef4998ce9b3/lutigipig.pdfIn PDF document text
- https://aashianarealty.com/file/6725635586.pdfIn PDF document text
- http://baugeraeteverleih.de/benutzerdateien/26632592480.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=free+negro+heads+of+familiesPDF link annotation
- 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_off00081ec8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81EC8	10680 bytes
SHA-256: `9d72f086db7e75de75255c3f4ed3b3a8162b7c958fbef5d75e3a07ed36ec1068`
`font_01_sfnt_off000836c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x836C4	17704 bytes
SHA-256: `91cb54d6875fe38aa203ef07db251bb627cd860ebb5db92ec7666c76f7fec507`
`font_02_sfnt_off00086512.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86512	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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