PDF malware analysis — malicious · 038f9e1ab072e778

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 01:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 78a966e57839e9af6fedaafc338f9542 SHA-1: 233996bd83003eac847e49f7ad7d541bf2c246e9 SHA-256: 038f9e1ab072e7787c43be48fd557690f91db901b9d7a97b2a06c711b1e3090f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=i+know+nothing+about+you PDF link annotation
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8b71fad3---ziwiruduxawaro.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cfacd885b45---55524254313.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2819f24b77---98608341106.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160899e963b0bd---11398408535.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3ba48013aeeda7e32abae6fc9f556cd2/17816566499.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa4797693---zebolunigupejupoguweta.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a527b4ce253---zagarawalelupube.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/57190771646.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/16187514318.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21d4eb79a---tomezivij.pdfIn PDF document text
- https://maconlux.lu/userfiles/files/padukegifozudazipovi.pdfIn PDF document text
- http://laweasy.kr/userfiles/file/nepilenuliwamak.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/bb755f7e347e92cf22bc8db72ddf682e/razoromawunabi.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160814e792b38f---sifasujenopubupimoj.pdfIn PDF document text
- http://www.findvoters.com/userfiles/file/nukuvavi.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5addb4595---kevevugazekuko.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/xanuxoreke.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2de51de869---ferirunazurofu.pdfIn PDF document text
- http://b-solutions.net/userfiles/file/biziwonidopemibejatak.pdfIn PDF document text
- https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/f298123f83dd6ebb4bc17f38cb52f2e2/maturofejadepeturiwawov.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1f11e03947a78752ed8a518b485405cb/70795386556.pdfIn PDF document text
- http://korean-school.hu/hangul/userfiles/file/vowoxekumakajot.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c898a9dd9d---nitadini.pdfIn PDF document text
- http://americandeliorder.com/uploads/files/68925241820.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_off0000ec92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC92	10424 bytes
SHA-256: `c1472c7ebe42017eedc3edd6b50ba38d7047dc7744578cb9bf1b18be51395a01`
`font_01_sfnt_off00010437.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10437	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011c49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C49	17488 bytes
SHA-256: `2a9d7eb4d3774fffd8a5eff292e5f0a04c327fd1ddf598e3601b82d84ff8b62d`

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