PDF malware analysis — malicious · 4bdd7000f38ebc07

MALICIOUS

PDF

87.0 KB Created: 2021-07-05 17:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: f5bdc8b1d5d6d64caddb49a6769cecd9 SHA-1: 86d59afa518145502bbafbcfaf57d1567c794ca8 SHA-256: 4bdd7000f38ebc076144063b051fe2eeeb79187e8786a161a568e6021d1c0586

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a potential phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and the nature of the URLs align with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://cdmvt.cz/sites/default/files/nutozoxaluwobiwu.pdf In PDF document text
- http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/xupolowekefitoxerew.pdfIn PDF document text
- http://helloshoppingnepal.com/userfiles/file/nitaguxuvegiwimodituguduf.pdfIn PDF document text
- http://pc75.net/upfiles/file/1621380600.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81986fb37---46767534511.pdfIn PDF document text
- http://chanakol.com/ckfinder/userfiles/files/20995325204.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/90953f8eb7500c6456e13b35f4f1d922/21890058739.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a3ef6f4db---43959436688.pdfIn PDF document text
- http://angelcabrera.com/FCKfiles/file/4530725741.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5d4a47cfa57c96efdefb734544208fd5/mekulemopewo.pdfIn PDF document text
- http://qiuyutv.com/userfiles/files/20210704041729.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/e87680b56fc60b1790713144dfba4a6e/foxunoti.pdfIn PDF document text
- http://studiocastigli.eu/userfiles/files/woxerusafetepajarig.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/eba05c59a5d17dc8947e2cff02d65730/wululitibumifivazoj.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dbe184fa8---58434878706.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fa005ac99---lalewokugosunabutivolosoz.pdfIn PDF document text
- https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/e2ejanetaapdkefh7mn0v91opj/kagugadesakeli.pdfIn PDF document text
- http://www.deewanalarab.com/up_imgs/88074774678.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/b5c82be9f73d3c79020c29bc96c25bde/pozajimegibolenubotelobu.pdfIn PDF document text
- https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/27b3f0aaa3bce11edc0b62f7a38ae56d/renetaxatebepejopin.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b926933677c1ba8564ac0e812547eb27/12260073887.pdfIn PDF document text
- https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/71t1u12suuavk70plo4cj53s87/35320211040.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9e93b6003---74230631246.pdfIn PDF document text
- http://aire-limpio.com/img/editor/file/roparago.pdfIn PDF document text
- http://premium-h.info/files/files/61076027777.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d321e59f0b---90015694871.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2d9da635b---2400102422.pdfIn PDF document text
- https://tskrea.com/userfiles/file/gonubarubopulobijezixeva.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=red+dress+baby+imagesPDF 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_off0000f286.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF286	10520 bytes
SHA-256: `bd9252eb202a69808975a0fc8ee06ff65a82efc82aef24424d784aa8e2428a00`
`font_01_sfnt_off00010a4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A4B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001225d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1225D	17024 bytes
SHA-256: `6dea2c488514cad7cffce04b36169b0e12312453c594a345b2e8339f1d6ca25e`

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