PDF malware analysis — malicious · 760874e0b1e0ff65

MALICIOUS

PDF

87.5 KB Created: 2021-06-26 22:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 01747e3c9fdde7d2b9322417c8e5c2ac SHA-1: 685214d2a29467f7c2fa662219ff075d4125dbe0 SHA-256: 760874e0b1e0ff65a7ac77ab32bc97f6d4a31ddcbd1d2c4abacffaa67115a14b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic findings.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

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.
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://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf86f46e69---bokogufagim.pdf In PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5445d4c57---dinitulokemer.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/802bdc79472f5edef78dd13a60c690a0/2230924935.pdfIn PDF document text
- http://buergerforum-tirol.at/file/vunapiwifejezid.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a848e927c8a---47540927934.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9m6rp2pc9if308u46slqpina59/86510784440.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c948c1431da---giwovixasujutafupu.pdfIn PDF document text
- https://hunde-katzen.at/soubory/22287647925.pdfIn PDF document text
- http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f33e7fc03---rixafon.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608565d01dce3---jebemevu.pdfIn PDF document text
- http://kagoshimakojintaxi.com/userfiles/file/nepokewati.pdfIn PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/l6s21tbq65l5uhr9a24rm8e0b5/45234212574.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/2581015332.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727aee82506---83728209399.pdfIn PDF document text
- http://chikatere.com/Upload/files/3773020807.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/61b3dead402fa93d375dfc7244af37f3/delakuburezofu.pdfIn PDF document text
- http://coffee33.ru/archive/file/87204703679.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jfmhpp5jt1vimjs7mhu4msabqo/2709634978.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/o5vlo7cfhu0argl9a1uruc7mq6/depelimopetemotefoti.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc1de9cf07---81126199618.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94ea292c11---ginepomig.pdfIn PDF document text
- http://reicar.dk/userfiles/file/kenuwofesekofoputimuxela.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c48a8b481---78643247838.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570c958a51---wamakakusofibe.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=best+roguelike+games+2020PDF 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_off0000f40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF40D	16808 bytes
SHA-256: `6d9da3cd2a9310e2e53144f033bd3d10acb179ddf1d5a1f0c22203aba7c79aa7`
`font_01_sfnt_off00011fc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FC4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000137db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137DB	10832 bytes
SHA-256: `96068df5ac3e3f81c9c95e77b884ac110fa75a2b878268fbab7db0f3b88826f7`

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