PDF malware analysis — malicious · 3b7ce140d9bf0364

MALICIOUS

PDF

87.9 KB Created: 2021-07-07 01:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 5c7a294311b33a0e31f3b57c64a1171f SHA-1: 8b8ae4eae7fb5b7afd430c31332de038884afdef SHA-256: 3b7ce140d9bf03642173e4a8d5539ce4927717e2964a13ae2a1bee317e3b49e1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a potentially harmful destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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
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.
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://pistant.ru/uplcv?utm_term=present+simple+was+were PDF link annotation
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr3odpucgbnv92ftjh95bu6085/fusumo.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606da17fcf0f1---43251350351.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073832f59864---8278278656.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c23baca400d5481af77e9e6a75c33784/ledigifaxikoti.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2q28qfef1ppv5slssi5l26maq7/zuselepufaral.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94757c916---bipik.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/4911a6d66bdb4b792c0cf6ec588cb8c6/dotabigamevakuwifetifejup.pdfIn PDF document text
- http://greathorserider.com/ckfinder/userfiles/files/56206628095.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bd0cd1ce6---xobufusunukororagebafafig.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/547d91a2f1e095ff7df825b953dc5056/32264717948.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096023865764---nivosegobut.pdfIn PDF document text
- https://anpheatingandac.com/nbloom/fckuploads/file/74603313339.pdfIn PDF document text
- http://asupuro.com/user_data/image//file/3562218485.pdfIn PDF document text
- http://aep-tc.com/cache/fck_files/file/11261246500.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/pajinorude.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/62154343114.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2e098a83d65596ea1951ed00cae36e60/sarujebonuxaxavurabofi.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be2beed97cd---zuvevozerokuvokedetinag.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b91e0306b34---lewixagoturubuwat.pdfIn PDF document text
- https://newtop-eg.com/userfiles/file/jolopetonidawaje.pdfIn PDF document text
- https://jordanadams.com/ckfinder/userfiles/files/dametadelese.pdfIn PDF document text
- http://turar-mussin.com/userfiles/File/15838110364.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7332fb86ff---59481267839.pdfIn PDF document text
- https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/b03b32706e9b24861d712f36f0be0b90/26410643230.pdfIn PDF document text
- http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a15cdfa0c5e---15280012385.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824be7abb6b---polovadumativiworiv.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_off0000f0ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0FF	19172 bytes
SHA-256: `11ebdb6741e5aeacfc32f0a600d7128694aca04010c1e23a45bfef88f4145667`
`font_01_sfnt_off00012163.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12163	10380 bytes
SHA-256: `62caf1fd95b612fda49acb9a26741c005567b2e5fa2e467dadb14c2f3946d388`
`font_02_sfnt_off000138e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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