PDF malware analysis — malicious · 0fc96a53eb838ac3

MALICIOUS

PDF

69.4 KB Created: 2021-07-02 02:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: c92b482bbb45a0478dbd06e3e220ff7e SHA-1: dd0d28df39174a5d2682e71a1a6e43bf3fa1e0b3 SHA-256: 0fc96a53eb838ac31da47065a0afd3c20ccb8e2e30fddda7e42b2b0375dd7e96

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites. The document body is unreadable, suggesting it is not intended for human consumption but rather to host links.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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 http://martom24.pl/martom/userfiles/file/mibotasamuteti.pdf In PDF document text
- http://donghozibistore.com/luutru/files/pokaloropulumif.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/gedop.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86843f0289---53384048512.pdfIn PDF document text
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/77b390bfd54004868dd5943f63a0fd96/13193612208.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7e6475cc589c0e949817134850206f10/21888109214.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087d9825dba2---13960891009.pdfIn PDF document text
- https://afayl.com/userfiles/file/jadifotevoturexutumoz.pdfIn PDF document text
- http://moreit.ch/productinfo/file/1846658596.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/sub21qchk7vjk0gp8mmbhcp8n4/piwob.pdfIn PDF document text
- http://animationcoach.com/userfiles/file/retigawujevafejefuf.pdfIn PDF document text
- http://thoitrangvabaoho.com/Images_upload/files/48115604263.pdfIn PDF document text
- http://shiokuda1.com/contents//files/26567006946.pdfIn PDF document text
- https://wemservice.com/ckfinder/userfiles/files/tajarurabovedabalimofa.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5a803935---1789673724.pdfIn PDF document text
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59028efb86---nevolak.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ditoa8po46oqo5hul4k10adr91/kelajowufibolamuxo.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/sp7t5umdaofm7gh0qucrn0bko0/63944941517.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/kifup.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/6fb153f4c33cfb0d5abbd5f195561862/36289221497.pdfIn PDF document text
- http://mppscstudy.com/admin/usercontent/file/raridekoruvum.pdfIn PDF document text
- https://albawadiroad.com/userfiles/files/36493032191.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4n9fcunrdjlgusfnj2ptscr220/78765522478.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/8jvgjv9dvh0hj4a784oej792ld/73141733416.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=number+writing+practice+pdfPDF 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_off0000b32a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB32A	14556 bytes
SHA-256: `2fbf90df544d426e843164a369a2009631d255a94fb096c13f5968a1f96640c3`
`font_01_sfnt_off0000d783.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD783	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ef9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF9A	10932 bytes
SHA-256: `8f7feff3f5a65e20bd8a06c81052f58f429cd3bc64bef8d8cc1725e5153a97dd`

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