PDF malware analysis — malicious · a1da9e974e333a01

MALICIOUS

PDF

84.3 KB Created: 2021-07-10 06:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 9078b4a563755989edd2d71fc4f7528b SHA-1: af6087c42efe0970b4e587c36b882151fdcb3aaf SHA-256: a1da9e974e333a01f8ae7cea767de8bf2ec7b99baf359a0f4460ad0ab0d747d2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm hosted on a compromised WordPress site, suggesting an attempt to lure users to external malicious resources. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan indicate a likely intent to deliver a secondary payload or redirect to phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ckb24od4qube2eltu2ruj6dhc0/ginabakafulemo.pdf In PDF document text
- https://daaeportrett.no/upload/file/12601864176.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0c1c5b577223cf8cbb962079aa482a86/8122487416.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160719ddd630d5---80670075900.pdfIn PDF document text
- http://asfus.net/virgsurv/userfiles/file/42625697990.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/168848111cf48a68627f808f70ef954d/87548981059.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/3mbf2n7fgrpb484p0gn0godvb5/nelevewekovam.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gq3a6dkrds5c07jvaarcoo75qj/piketajisigerupuno.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c794e83d8dc---21767220115.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d801885821548ff9cbda1b56a4d9965b/50529524281.pdfIn PDF document text
- https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8e79e739---4394333431.pdfIn PDF document text
- http://fioredda.com/userfiles/files/1864086614.pdfIn PDF document text
- http://soles2walk.cz/data/file/28526541305.pdfIn PDF document text
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/c7bc7a4e261fc4b0c9b8a998f8d7c049/gutipagitudexezuxedilakor.pdfIn PDF document text
- http://spoilersmensgolfclub.com/clients/865201/File/dusetaze.pdfIn PDF document text
- https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ml6b9g3u7cgpm210oi4vqdlmi0/25710764774.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/8akmp5u2ti3gbdd3nu57u9oph2/rumixo.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94ba11a8d1---vodinozevamonugefulujigok.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070962346422---94899041332.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da30ef2bb---38385426041.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e630c56a88---guzuwoxuxigisudikavim.pdfIn PDF document text
- http://s8radziejowice-paszkow.pl/userfiles/file/kivakozu.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/xalezuzufusufikinis.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=is+wide+grip+bench+press+better+for+chestPDF 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_off0000e5e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5E6	10868 bytes
SHA-256: `3f6180d79a3859f8489fb3b8fad3b4b9faae9d5c319be42874651efb9fff415c`
`font_01_sfnt_off0000fe92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE92	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000116a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116A4	16720 bytes
SHA-256: `dfc5c56ebd888f7beb1a9e172445c27503992ba9e63c768d103f328b3b08c36a`

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