PDF malware analysis — malicious · 168973d2e73c98c7

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 07:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: aec58714b612b4f33fc02f966b7ab058 SHA-1: 6b6d95015b1dfb4ca23d4f90e484601886380739 SHA-256: 168973d2e73c98c7696c8a0af7d5720941bad8f445c2d71ad336bc36b1bbe3d5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This 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 other disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://infrive.ru/uplcv?utm_term=street+fighter+2+editions PDF link annotation
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac7c5ad53c---9685894899.pdfIn PDF document text
- https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/5g1kfvn4919t0ckfs1sbhk4emc/15372607830.pdfIn PDF document text
- http://chrisdepanneservices.fr/Sites/cds/files/53517938851.pdfIn PDF document text
- http://hzdsbg.com/uploadfile/1620813101.pdfIn PDF document text
- http://vo23.ru/upload/file/35024159241.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4839a2579---fitoxutedugelowukajewu.pdfIn PDF document text
- https://northwestconvention.cz/data/files/sofuzabipuwubenapobora.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/topoxodisuburikopo.pdfIn PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/6mo0h2vb66acv00k8oebd3lh3h/nenusulanenep.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/gonoxosefasaj.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c55ed5ff2---jamisezejufupofiw.pdfIn PDF document text
- https://irantruck.ir/data/file/88295351815.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085046cd32d6---48564337724.pdfIn PDF document text
- http://banglatalkies.com/dynamic-images/cms/file/27967294282.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5571d3b2d---marasedavotexibalarolefik.pdfIn PDF document text
- http://msinziniering.com/userfiles/file/fizelovosatabefusi.pdfIn PDF document text
- http://www.fashiongale.ro/userfiles/files/suvebitomujudoma.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/be76d7d2860d3d2f4944c1748de6afbb/goxufobupolulowofi.pdfIn PDF document text
- http://tajeer.co/userfiles/file/25993990567.pdfIn PDF document text
- http://unicorn-furnitures.com/d/files/34864470633.pdfIn PDF document text
- http://activesolutionelectric.com/images/file/76555552587.pdfIn PDF document text
- https://dbmotorbrokers.com/userfiles/file/2722806311.pdfIn PDF document text
- http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/92225535092.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/afe1a222b1eac76aba67c67700a3f9c8/27754423073.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_off0000c0b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d8c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8C8	10620 bytes
SHA-256: `0ccbccc3c8797bcd93eb33d1c88c66ef5eec4e247d0049e41bdd67ee707ae8b7`
`font_02_sfnt_off0000f0c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C7	17212 bytes
SHA-256: `917f9afc13f63d59f0e440e2d5b268a46ca3e5f8996a0ce7fb1c1d27d33e1a24`

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