PDF malware analysis — malicious · 14c45312cbcd79fc

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 01:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 3a6c11c3bc353e076981c3faeef58683 SHA-1: 5dba697bb12d67e791bdc431731ab39a5437b335 SHA-256: 14c45312cbcd79fc254a8e2d2c059b428af2419ce4cf4221d31a4fc8b55554b6

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The heuristics reveal a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a tactic to distribute further malicious content. The presence of a 'download' button lure reinforces the intent to trick users into executing malicious payloads, potentially via embedded JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=10+frame+template PDF link annotation
- https://ceccarbotosani.ro/userfiles/file/58244211877.pdfIn PDF document text
- http://prttour.ca/FileData/ckfinder/files/20210627_FDF4E78006028FDA.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b373472d2---77679251826.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83682bc2bb---3014070542.pdfIn PDF document text
- https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/kdaiup2dv7bh7l9ljoh5vf6qd3/32129775499.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/5ff7241300a2151c443067999a232bef/vibak.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160760d718eaae---basupizuralasidinazeb.pdfIn PDF document text
- http://shethof.ch/cgi-bin/dynamisch/file/zabupananililodon.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098df7b1292a---pozilunodafon.pdfIn PDF document text
- https://office-agglo-larochelle.fr/userfiles/file/7523759673.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088e943bf80c---zumasizopeduvewuw.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/20957169784.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/546416f9769e57b7990815d368a6cc0c/75273235864.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/bc342a7cc05ddb2e3eb6e3b80e50b531/33006095167.pdfIn PDF document text
- https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/d543c52fa78cf043a158b234a65c5dda/xazimugetonumata.pdfIn PDF document text
- https://bienenaktuell.com/sites/bienenaktuell.com/files/file/9974963650.pdfIn PDF document text
- http://market-oborudovanie.ru/upload/file/jitifibi.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/037134d1f9ad0f5904287856732acae4/bonegojesuwetimodoxeja.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec7940e4fa---85089105461.pdfIn PDF document text
- https://yucekalipmakina.com/tsrm1/img/userfiles/file/5149113649.pdfIn PDF document text
- https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/2e5dd20f5718d097a39844a008c2b504/mugusajereluwalijomix.pdfIn PDF document text
- http://gramercy-grand.ru/files/file/fomapixomogubimana.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a73f04954---57415108236.pdfIn PDF document text
- http://bakoca.hu/files/file/85165810609.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_off0000f24c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF24C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010a63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A63	10112 bytes
SHA-256: `4f91842b2277ca862c17a052cbbba3c3f4eb23108b7412ceba1345174546d129`
`font_02_sfnt_off00012100.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12100	17064 bytes
SHA-256: `a037250486b3fda69a89d8a17c87caebe11471a3dbb5555ee216f3fda20246bc`

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