PDF malware analysis — malicious · 9cd9c047755eca32

MALICIOUS

PDF

83.8 KB Created: 2021-07-22 20:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2da17e6ee1f146c5b1e9fbd4c6a68a81 SHA-1: 24b9c3777e1d20ae6a513533e963d79574d7a863 SHA-256: 9cd9c047755eca32d7cb2af4c920a5c3beb2318bacad4ac0eb193c68e980e5b6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to malicious sites for phishing or further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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://123natura.com/stockages/files/35271644449.pdf In PDF document text
- http://kemenyseprosiklos.hu/upload/file/93336018034.pdfIn PDF document text
- https://bbpartner.cz/userfiles/file/fazamalitakorepifi.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/wosilesitasopulezeti.pdfIn PDF document text
- http://topnotchimports.com/ckfinder/userfiles/files/98700645460.pdfIn PDF document text
- https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/1dd9c678012d28e4b40aa7f2e2b16dcc/xegubuvalidav.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d256f148e7a---88381069894.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00511839f---41939594771.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ccd98be24fe090ab47ea96f3dd939cee/71416498434.pdfIn PDF document text
- http://mishelik.ru/userfiles/file/75427881131.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9aab31679762661e5dc36944c447eb3a/tojapuxijamoguri.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf431d03c18---vutizotobonube.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18152bca92---42326375074.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160cee0e5b7a36---xezazowuleterejudorudu.pdfIn PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079edf342261---nunirenigi.pdfIn PDF document text
- https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086945364b27---87994356099.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f194854832---gerojutegutivofutofak.pdfIn PDF document text
- http://ourgans.org/userfiles/files/lewolegikazobuzulagab.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c2225c7be---fanopojir.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/701c3523f597967651a3ec12f14f241b/40701639819.pdfIn PDF document text
- https://justbuymeds.net/userfiles/file/19821940461.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e015524602---varuvol.pdfIn PDF document text
- http://derma-dts.de/files/file/47597176577.pdfIn PDF document text
- https://diarch.in/WYSIWYGImage/file/13690069031.pdfIn PDF document text
- https://liffeyartefacts.com/fckimagefile/file/45406036361.pdfIn PDF document text
- https://myarchitect.es/ckfinder/userfiles/files/58221941369.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+meaning+of+splashPDF 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_off0000e08a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE08A	18308 bytes
SHA-256: `4f3be8708e470c2a62533ffcee3593911b748542e8106816cfb3da35a25920da`
`font_01_sfnt_off0001106c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1106C	10700 bytes
SHA-256: `8f66759943ea369028d28e8ec36c2a11b7e1a1eed304b1e0a7fb4f7f23d11514`
`font_02_sfnt_off000128d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128D2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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