PDF malware analysis — malicious · 0bc7c6ec07200901

MALICIOUS

PDF

87.6 KB Created: 2021-07-04 23:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: ccc898fdd0eb69ba831f3a9e7e98c7e2 SHA-1: 4ec991e0d055252ba95ba89d9493bee1c81364cb SHA-256: 0bc7c6ec07200901e957c7189d3a60e4ea7a3b94134e2a5d0b87e2ed0bc8ca69

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The embedded links are likely intended to lead users to phishing or malware distribution sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://irlanc.ru/uplcv?utm_term=how+to+delete+blank+page+in+the+middle+of+word+document PDF link annotation
- http://aktifimmo.lu/userfiles/files/raxebugegaj.pdfIn PDF document text
- https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075b12dad94d---71721206845.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c9d0fb179d0d0aa93b697573ab6be341/64358778866.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/mk4n0jha9uoh5ime6mobb3spig/zukujisivezupunaderiri.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/vegelakegodamomitisumezul.pdfIn PDF document text
- https://technische-dokumentation-hoffmann.com/upload/files/3873219774.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/14l97rpds4k6ms7nvethrf7cjf/91916544022.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d6bb82ea---mazuwefikiwumefeka.pdfIn PDF document text
- https://datajournonepal.org/files/45081676337.pdfIn PDF document text
- https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/4b6bd7f8e811a7f10866fb5a807c7cc1/wolirapisevomaxebaz.pdfIn PDF document text
- https://veterinarycarefoundation.org/userfiles/file/8859289307.pdfIn PDF document text
- http://bhk-aindling.com/userfiles/files/kiluwakabetewujakoza.pdfIn PDF document text
- http://compufoxmail.com/userfiles/file/bepevit.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/819b7730b3696a94df39e57ded92e04e/rakipazojirokesazadazox.pdfIn PDF document text
- https://vydavatelstvoklett.sk/userfiles/file/36466973022.pdfIn PDF document text
- http://marketherballize.com/ckfinder/userfiles/files/19304087964.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf64a2eea8---zevakapaxis.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30db31878---sugosaxotulezu.pdfIn PDF document text
- https://banderlogclub.ru/Files/file/sofunavok.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb48fd936f---33181198022.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/7235621103.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7246486563---sadujakujuzubilujuxu.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ea0b96fa---69222116285.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_off0000ef14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF14	17484 bytes
SHA-256: `f84dd85c4c7f305c05dbb3977e3a4c90884f65e96a88e82e99bf255dc104f954`
`font_01_sfnt_off00011c9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C9B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134B2	11308 bytes
SHA-256: `3fa5cf99f4a77aea6b1e8a03da6d5d9b277125ff3f7bc8e7eb5647afbb985f61`

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