PDF malware analysis — malicious · 7cc4033638a8b8c3

MALICIOUS

PDF

89.3 KB Created: 2021-07-07 02:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ca52523fd1bd890b0b5e381175ee0b2b SHA-1: cc761f8e79af6eb1bfbac6aa37e53202fa5ec3c5 SHA-256: 7cc4033638a8b8c3ec1fa3debb14ab55b2d62dd41d8ac5349e11b6b7fea26b23

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The presence of 'utm_term=download ebook' in one URL indicates a lure for users to download potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://alutat.com/data/file/10772343604.pdf In PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a01828cc07---27017168498.pdfIn PDF document text
- https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbfpe6hu24gsrmehhtv5pcjord/tisaviwigexudedu.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/94490876415.pdfIn PDF document text
- http://learningkey.org/userfiles/79414628016.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/4585394285.pdfIn PDF document text
- https://5uempat.com/contents//files/diwifakefobogap.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6f158d1a3dcfedc0c1213b000a72fa6a/sojezolekaxo.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a177fc978f8---58724428592.pdfIn PDF document text
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/41541002d74eb1c5228dbcc17b6ffdcb/32457003722.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/to1v23264uao8juv1ppfgvl0sv/jojokunutizanobakugakijo.pdfIn PDF document text
- http://geoodwierty.pl/files/file/23771890111.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/01fb13e5402cffa12f9c0a1669889d8f/rexemalabexikibuten.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa66028193b---38051316579.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a944c1d6061---datukozigux.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbfa85d81d---44681249476.pdfIn PDF document text
- https://dgaspcsm.ro/ckfinder/userfiles/files/wonogakuvavawuzadewukimu.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/odveq3tammtpk78h044ol8qcg1/jinugamixirox.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3dd0b4d6336ca2b53920fb385e459aa1/59883036597.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/ddrrsp7464qndt6revb2k79coq/gifevewivakokoluguwinej.pdfIn PDF document text
- http://goddesshair.net/upload/users/files/78373145427.pdfIn PDF document text
- http://neurooperations.com/ckfinder/userfiles/files/saworinevax.pdfIn PDF document text
- https://emmaushuis.org/pages/36396566955.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/47pkglpa59mu4jii19v533nko1/vapenezuv.pdfIn PDF document text
- http://jshtextile.com/UserFiles/file///jabomimuvoxa.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+ebook+the+righteous+mindPDF 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_off0000f6cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CF	18092 bytes
SHA-256: `cdfea2473ddc177a074048dc266e15acb5e236253dc02c381de0adf08e303b29`
`font_01_sfnt_off00012665.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12665	11116 bytes
SHA-256: `b4ce6324a006a4ae29523dcacb937de57c9fed63aa19c152a8732d3fc8fb56b5`
`font_02_sfnt_off00013ff0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FF0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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