PDF malware analysis — malicious · a5296fb8e316375f

MALICIOUS

PDF

89.8 KB Created: 2021-09-17 13:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8d9cbd34f450fa564629a47702ff48f2 SHA-1: 5c3ad5d2bffa2dac852509cab6aac098a08178c0 SHA-256: a5296fb8e316375f00052cd1093079401aa5b14050d2940109925c55ac896587

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may also be instructing users to open a password-protected archive, a common tactic to bypass security scans.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://coretry.ru/uplcv?utm_term=apk+hack+chip+higgs+domino PDF link annotation
- http://nokianhakkablue.ru/ckfinder/userfiles/files/ranugomawepalarutunudidom.pdfIn PDF document text
- https://marlin-aquarium.ru/ckfinder/userfiles/files/64092236620.pdfIn PDF document text
- https://vroa.pl/chplusfiles/file/zetuv.pdfIn PDF document text
- https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/7d3d23k8fclpk5lrt240ovi07k/3664401911.pdfIn PDF document text
- http://smingames.com/ckfinder/files/38531834596.pdfIn PDF document text
- http://enovosti.info/ckfinder/userfiles/files/jugixevawunuxedunazilip.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1612f28ea17239---59179440548.pdfIn PDF document text
- https://himalayanwanderer.com/himalayan/userfiles/files/motigel.pdfIn PDF document text
- https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/tenagoxizifi.pdfIn PDF document text
- http://musicandyouapp.com/webupload/editorimg/files/waxerajinubejubabizibup.pdfIn PDF document text
- http://ekotop.eu/userfiles/file/kefovakabarusonekigun.pdfIn PDF document text
- http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/rezetiv.pdfIn PDF document text
- http://atmaircenter.com/lb/userfiles/files/kugolozevawoxoxabavomika.pdfIn PDF document text
- http://amoy-art.com/Upload/file/boxidoripulikuxugeju.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164952b367---73078509627.pdfIn PDF document text
- https://suksesunited.com/contents/files/5766656256.pdfIn PDF document text
- https://tatvan.in/userfiles/file/bafujusasubuko.pdfIn PDF document text
- https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/cfmfk707i8gsoq888dv5jka547/sotin.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/voitlptcud403lr2mdv3udf9ng/bugeduwituzerizokif.pdfIn PDF document text
- http://bezagsecurity.cz/userfiles/mozizusaro.pdfIn PDF document text
- http://indemo.pl/Image/files/95700951515.pdfIn PDF document text
- https://la-klamm.org/Files/files/9781507190.pdfIn PDF document text
- https://flims.atelierleuthold.ch/userfiles/files/wijapolaraw.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_off0000fa62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA62	17960 bytes
SHA-256: `afb96ddcce8f564b1095eebcd7c9852f977b178ce18b95abf2448f4a1bfe721c`
`font_01_sfnt_off0001292d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1292D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14144	10656 bytes
SHA-256: `162a4546a248d2f0f41ab177d649d74bfecdc4ad786d1d6fc23df04115435a39`

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