PDF malware analysis — malicious · 145ef98057b29375

MALICIOUS

PDF

88.8 KB Created: 2021-06-30 08:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 12e403203b4e5b05e065739daf03b719 SHA-1: 623ead3e7b5177d99243ae400a9546a7247fdf5e SHA-256: 145ef98057b29375c5ec5e2f9de1ac2185d0ff756669f212d071d9fdc4ec21e7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae89fd0794b---91283695177.pdf In PDF document text
- http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/kkfgdc4o8b39330u8au56p2nsu/fisobemavarawugub.pdfIn PDF document text
- http://artospace.com/pics/file/juwabasexatazasuwatebo.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2ab06a7c5987fa6aab7679aadfbfbb35/19516655305.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ajshuehb5pb2icjfvgn5em02n2/tetididexumimadereruru.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/1917ba2d31371adc61707733f78587f4/vokilinafupiw.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ecb89d44---kimibekusemedizazupa.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608096771722e---19081025234.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/b35e18cd2e2e9dc4d2a1fdfce889b8c3/putuxujobixoromusedut.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb3dfeb0c5---39418007843.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6d8b4b6812b0c5ce20d797fe332ce18e/xanurodofumas.pdfIn PDF document text
- https://travelstore.tn/userfiles/file/9270135900.pdfIn PDF document text
- http://anandtouristcorporation.com/uploads/46574404788.pdfIn PDF document text
- https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/99c6d499332c0922e375c7ee7f65a1df/sedafefufomabigufigugob.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9e3c5535d---bolejuwivifiba.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb76bfd96d2---wedatadadawarejudiv.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c86aa5dad4f---86350285193.pdfIn PDF document text
- http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/13483701659.pdfIn PDF document text
- http://villabrown.it/userfiles/files/53145671722.pdfIn PDF document text
- https://b2b-intelligence.it/uploads/file/54611391949.pdfIn PDF document text
- http://kiiga.ru/userfiles/file/gagaxexonelofobe.pdfIn PDF document text
- https://mallncart.com/userfiles/files/95907777485.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608665e2a502b---timuf.pdfIn PDF document text
- http://bertrandetgastineaudesigners.com/userfiles/file/tozujos.pdfIn PDF document text
- http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/tuner.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aktd5eh830k68k1ehsba1ijo9s/51117513652.pdfIn PDF document text
- http://cpils.com/userfiles/file/wofejakotudipumitututeki.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=apple+pie+with+cheddar+cheesePDF 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_off0000f629.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF629	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E3B	17544 bytes
SHA-256: `c313b285b689d95c54dc2381c472af10a6c007940a44a8f4f9829a127652d394`
`font_02_sfnt_off00013c0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C0B	10452 bytes
SHA-256: `6de823cb837f64fd072077f1ff5f79f91d2fa7d5dfb59a3194d5b8165a767dab`

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