PDF malware analysis — malicious · 38ca650c2257c81c

MALICIOUS

PDF

93.2 KB Created: 2021-07-14 06:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 2b984f095d412d1bfd50f6c3780e0485 SHA-1: 1239a1ef099ec4b84b382d1970423be54458de28 SHA-256: 38ca650c2257c81cae47fd1d618e3578f952e43da405025fe7c5384a459efdc7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple potentially compromised WordPress upload locations. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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 http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/744046b3c90ffb5f636392b54d164a32/gawutupulexupekaze.pdf In PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/qbp65gntg3npkf6a8nja8bmtm5/sejesazolim.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad21bdb6b---69169595926.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bccd59fd9---9231797101.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/defr65ekp48rju8hud7gi93864/63964791736.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ffc83511f---3516594007.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4b8d3dbeb783db113436e34a645904a9/fudavutes.pdfIn PDF document text
- http://matchedtubes.de/userfiles/file/7154198598.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a596b64796c---56941014943.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b7922e304---sulolarewonax.pdfIn PDF document text
- https://congchunghadong.com/uploads/files/64618674935.pdfIn PDF document text
- http://akademia-jedenastka.pl/zdjecia/fck/file/77237322351.pdfIn PDF document text
- http://eyupsifalibitkiler.com/resimler/files/zurijidirejopodilijenimil.pdfIn PDF document text
- http://kimwendelldesign.com/ckfinder/userfiles/files/29147374403.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/51du83gv4564mfkjvcisrit1uc/81680631596.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/gonhup5hm8ll572gcu5u1iqpt2/84654557011.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/1ad206f43a30025bbf1e4010e2e30848/15271545336.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/49584220369.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/d07c65c4e29766d753fcc7d2e44ac6ea/mulelomafududujadavuko.pdfIn PDF document text
- https://xanbiente.de/userfiles/file/47966771232.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/fc9t670p49l8ir8ln6k76373g5/20394675052.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb05949d9---48058598963.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b224f1e122deeb76eefa3a96fb1c854f/894327546.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+living+room+coffee+housePDF 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_off00010946.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10946	18044 bytes
SHA-256: `9b367320323a4c276f2629379ce08122310ed91965e38745b45593f075e9cc43`
`font_01_sfnt_off000137f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137F7	10652 bytes
SHA-256: `5159db00843f9becba1d0da6571634cc6060ccd19703a9693a331122a1ef52cc`
`font_02_sfnt_off0001502d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1502D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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