PDF malware analysis — malicious · 909e2df0c8fa3dde

MALICIOUS

PDF

95.7 KB Created: 2021-08-09 22:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 73a2366ea2d7de0c01a7f124e59dd0b1 SHA-1: 5a0e0bb2c26dcd84a078f431fd44b60ad3de3175 SHA-256: 909e2df0c8fa3dde2bcecad7481d2b77b57487fd08ff7009e723a8dd36fb3c09

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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://pistant.ru/uplcv?utm_term=how+to+properly+use+a+swamp+cooler PDF link annotation
- http://tzoetemondje.be/uploads/files/noxafururogedanisuzazoj.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///33682012279.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7bjdl8bdofhg7h0rmcgul02nm1/pixitanoropowipanexaxuxow.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/luxarevuvimogex.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bb842d712---feturajovubunamubutipib.pdfIn PDF document text
- http://asiadomainstore.com/userfiles/file/9545766116.pdfIn PDF document text
- http://faisaltowel.com/survey/userfiles/files/dixazawuzevuzegugob.pdfIn PDF document text
- http://www.contal-farmer.com/uploads/files/kavis.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977737b31ce---18254839066.pdfIn PDF document text
- http://55thocscompany.com/clients/62662/File/fifirobivulusaborili.pdfIn PDF document text
- http://daeryuhealthcare.com/ckupload/files/narajan.pdfIn PDF document text
- http://carszana.com/image/upload/File/54967043933.pdfIn PDF document text
- http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55034485821.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f12b4f9be56---60046104338.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758501872da---70329496940.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/9dc2bff6d4b01b58a53b488e7001e737/loguxokuzosepip.pdfIn PDF document text
- https://motiwalainstitutes.org/userfiles/file/digexaxodedufil.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/9qhvtonh06qdl01ps165ua06t1/48441970279.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b61c1cfb2---dejariluw.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/792757d4b923b981160f448a63d05675/22456772486.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/bomovetasabufadesole.pdfIn PDF document text
- https://seedomoretravel.com/files/files/18486363644.pdfIn PDF document text
- http://aisef.org/uploads/userfiles/file/file/zivus.pdfIn PDF document text
- http://ifa-astrologie.de/userfiles/file/jojeburubododovixezige.pdfIn PDF document text
- http://3lbordercollies.com/clients/a/a5/a537dd6ebb785c9f51a9b4acbfea693c/File/97593381197.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/hjnfna94pcd280iu6579r74k76/24396696421.pdfIn PDF document text
- https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/jngjoe3dtdhshnckgdg578i0po/volibivukejasu.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d0db279ee3e41878059d5e212aab7df1/90729470364.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_off000110d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110D8	10632 bytes
SHA-256: `cdb6508895baccc9b678f26b34528bfb519d123c44f201e42d73fe15689be250`
`font_01_sfnt_off00012954.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12954	17204 bytes
SHA-256: `3a6534867e747fe19bfc0645ab5f568284b1213add2f34a408efa622102d6221`
`font_02_sfnt_off00015653.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15653	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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