PDF malware analysis — malicious · 0d85723994616acf

MALICIOUS

PDF

87.8 KB Created: 2021-08-01 01:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 31df94b6a1abcb2060378edf0e761d16 SHA-1: 1d8cdc31a825269202c05b798cdba4af699d3a6d SHA-256: 0d85723994616acfc74ae601ce418c68a1f5e81fcfc644474709196ce3be4986

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It contains a link farm pointing to compromised WordPress upload storage and other domains, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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://clubelsendero.com/img_pag/file/2810429264.pdf In PDF document text
- http://pileshoppen.dk/userfiles/file/39930737872.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5eb96476c1---16835037175.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/0a4ed626b34a09574da4621041a8f7cd/poxoxuli.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aaf7ea973---79609547817.pdfIn PDF document text
- http://amphorabeautyclub.com/campannas/file/sepunizujosutukok.pdfIn PDF document text
- http://cansuyu.org/resimler/files/kebinu.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fddb1d65ad---28492693196.pdfIn PDF document text
- http://gptools.net/userfiles/file/81373084584.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b69812bdc---12722653118.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1762138cbb---rasogogavaxaluwid.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d184b5ef1---gadulenerikasumurikera.pdfIn PDF document text
- http://kgmda.com/upload/files/26511439194.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9147d3332570a6e754ea1b3b65da6b18/jusedeluworodulamexi.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/vu8p55ouqkg6rfpbcjg3l02sm6/36234183899.pdfIn PDF document text
- https://www.nitdgp.ac.in/uploads/userfiles/files/84911359437.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/mp1nml3h4skcdirvf3bjodtatl/jevirovimuvadeniruzazomo.pdfIn PDF document text
- http://cuspsurgeons.com/userfiles/file/begodava.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b514d22917---49233035350.pdfIn PDF document text
- https://ohcsi.com/ckfinder/userfiles/files/51839509201.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160988fab497ab---zuxerurexotupinudigod.pdfIn PDF document text
- http://msnladyboy.com/ckfinder/userfiles/files/kokapenata.pdfIn PDF document text
- https://alsharqcc.com/userfiles/files/sezozalerapokakufevo.pdfIn PDF document text
- http://telekommarketing.com/firme_data/files/gufolurigiwikezizakisoter.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc30f100d97---sotoxinoxux.pdfIn PDF document text
- http://mlsy.cz/images/file/files/25593810777.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=video+converter+pro+vidsoftlab+apkpurePDF 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_off0000f024.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF024	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001083b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1083B	10980 bytes
SHA-256: `f44df28921256917cb4046f41e88a6efd18f337e308177f69531f7494a1edd47`
`font_02_sfnt_off000121a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121A4	17328 bytes
SHA-256: `7ad874644a2f78c1491ce9c0f5fc83d16d90d271d327dd2435b00561c3078b9c`

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