PDF malware analysis — malicious · 6e8d7cc73f92607e

MALICIOUS

PDF

83.8 KB Created: 2021-07-08 08:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 58bcc989faaae0bd4466c3f44a81ceac SHA-1: b1139f110164c7d351364d79b198747a796a0f6d SHA-256: 6e8d7cc73f92607edd1c42c0ca9ad3260f382ee0b536cde0b917ea5114c808a3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/8ea35893c2d554c392cfd2968abc8533/dubokotuzetuzotuju.pdf In PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f66bfd27---13284234991.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/281cebc6b760e69e378ff4fe513f5f34/37636075515.pdfIn PDF document text
- http://parejalecaros.com/adjunto/upload/fck/files/14062443570.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac0c35605---74286073934.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e8cac243ed61854c40e78d79608e57cf/83755908744.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/125f58eafaf8d2b9d44a4a210d4f3d3d/nulor.pdfIn PDF document text
- https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/7a830e1322f79469dacb6eb42dfbf46a/kosomusebapimirotiwidopub.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/99440286981.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16087cc9320109---74034610034.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff06d6513---40620995053.pdfIn PDF document text
- http://randoquad72.fr/userfiles/file/veretugileriremu.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/48237faebb36659f04313d49633f250d/6375190633.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b5e0adb6021f05e7553b59a069baa5ee/zovenom.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccb5498fcb---darevumozuzoxeligavano.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/l80stsaqs49ddedodhbdoclqnp/17584265377.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084c2556eacc---falipegefafijibewogulula.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7ca03e9e7---80047890167.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3ff7ca7fc---67245098750.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6d0799832---ketezenevilefaxib.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed868baa42---32239938398.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/toxirodaloladipupapupan.pdfIn PDF document text
- https://aucordechasse.fr/vosImages/zonasebuxitorupetuwep.pdfIn PDF document text
- https://hosvagyok.hu/userfiles/file/divifemoj.pdfIn PDF document text
- http://ud2-140.com/files/78220474821.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=scammer+numbers+to+prank+call+2020PDF link annotation
- http://s292376414.onlinehome.fr/datas/imgmail/file/vevalawof.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_off0000e2b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fac2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAC2	17236 bytes
SHA-256: `f6507919b9d8af1ee8fb6c453fc8982512c0086bb91fe98a802fdc61ccc9dd27`
`font_02_sfnt_off000127ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127FF	11092 bytes
SHA-256: `ae9cb62e0156b041f32aac16a1e83fb15377b7dd280bcbd3fe2f4b4938f10cda`

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