PDF malware analysis — malicious · 96b0037a8a95ce2c

MALICIOUS

PDF

86.4 KB Created: 2021-09-21 01:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 2b7172650380b8c348f169bfea2a1457 SHA-1: 9194b7265dd9792f0bc2e4c8148c79e58897e12a SHA-256: 96b0037a8a95ce2cfbe55ff0c252ca3c5a3e1d4efce5270583fa8a305e546a20

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 Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure indicates it functions as a link farm, directing users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=vater+app+android PDF link annotation
- https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/1illq5ase9ovkd0m7qb7vvnpkl/81636731659.pdfIn PDF document text
- https://naucharts.com/ckfinder/userfiles/files/17967648683.pdfIn PDF document text
- http://orthocarecentroortopedico.it/userfiles/files/tokunimenazotugatog.pdfIn PDF document text
- http://opakowania-loga.pl/zdjecia/fotki/file/sisosaxusupev.pdfIn PDF document text
- https://tennis94.fr/img/pics/files/63249338886.pdfIn PDF document text
- https://halkapsikoloji.com/userfiles/file/72648604738.pdfIn PDF document text
- https://www.sudoku-cool.com/ckfinder/userfiles/files/33559758415.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b7a9858287ba824631735e5cbe6a55f2/56401831536.pdfIn PDF document text
- https://apz-arte.com/ckfinder/userfiles/files/26395060034.pdfIn PDF document text
- http://vetsnab32.ru/userfiles/file/4182093670.pdfIn PDF document text
- http://yangpupark.com/uploadfile/files/50119157147.pdfIn PDF document text
- http://dailyliving.nl/ckfinder/userfiles/files/64973730688.pdfIn PDF document text
- https://www.hmgfinance.com/ckfinder/userfiles/files/54588686115.pdfIn PDF document text
- https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/kupubatoxupesojijowegefa.pdfIn PDF document text
- http://technestudio.eu/userfiles/files/jijujawugijibajesumuxi.pdfIn PDF document text
- https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/d6o7ctto6fvagju3il5kjmqt8o/15287905433.pdfIn PDF document text
- http://posekatzahradu.cz/files/file/55631485550.pdfIn PDF document text
- http://investgeorgia.ge/userfiles/file/83670070330.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8smahhiu6tcpiid96m69foj581/22217540960.pdfIn PDF document text
- http://ciskmv.com/css/file/lobevewukalugun.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408e15705a3---bokojelezobebusuditunoko.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613872c9d4368---zobunujelaworedev.pdfIn PDF document text
- http://abnigakgdsg.friendship-match.com/upload/files/36130243165.pdfIn PDF document text
- https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2cca65bbd0f05733c5c67ca814e7b839/64833662095.pdfIn PDF document text
- http://shuimotongyuan.com/userfiles/file/61775333981.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_off0000f0bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0BC	17360 bytes
SHA-256: `80535023c384cf62ef63cea63ceb2331febbdb33a24a05c124707e842206031c`
`font_01_sfnt_off00011d78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D78	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001358f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1358F	10140 bytes
SHA-256: `d12f77f2fc6b743ce93bd6c5521850cfb526aec3ba3ffcaea29241980862d3c6`

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