PDF malware analysis — malicious · 12a6534592ca77b3

MALICIOUS

PDF

92.5 KB Created: 2021-07-24 10:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 2acb89601fe097e01c3c4d68c6a796fc SHA-1: ec83fcea4fae4b481bc9a5311baef33de207a50e SHA-256: 12a6534592ca77b39362b7b781b8414fc62bfe1a50f2ca1f77897d3a0f5cd21f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a tactic to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9726

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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2kkol2fdbq3gls8r3t01jp4s13/17932828045.pdf In PDF document text
- http://monkey-do.net/userfiles/file/93896389196.pdfIn PDF document text
- http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/79458447137.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/xufeguxabisurul.pdfIn PDF document text
- https://bloomeng.com/uploads/gevanarafek.pdfIn PDF document text
- http://ashioke.com/images/library/File/zasasijabifazedonubum.pdfIn PDF document text
- http://ats-dz.com/userfiles/file/dubatuxedubijaniwazezosi.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608533fda29df---nufejefago.pdfIn PDF document text
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa32d588f38---gasajoferuwogewozozuw.pdfIn PDF document text
- http://consoles-a-gagner.com/fckeditor/userfiles/file/65649969149.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/7a18328de3a0aee49b2d3f02f3e9d454/gadig.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/lcqoo9ip2mdt5alukebn89r8eq/mejetak.pdfIn PDF document text
- http://atek-ent.com/upload/file/fugun.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/aoc99981eesuq7r3lic2nj7ec5/norugeximut.pdfIn PDF document text
- http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/86080729947.pdfIn PDF document text
- https://equantumconsulting.com/files/files/99568937277.pdfIn PDF document text
- https://eatorhours.org/e-bussiness/fckimages/file/28146895468.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608332a80f25c---wimavuno.pdfIn PDF document text
- http://jar-ted.pl/file/sijidakisonazonunaluwimi.pdfIn PDF document text
- http://greer2001.com/clients/e/ea/ea56749d84c1a2d7db36d2c51c833a37/File/45177907354.pdfIn PDF document text
- https://lapakunited.com/contents//files/76297957410.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/bb351ffac369d26f13c52551d1416f75/gibabazezizikovivorov.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160aba7926ffa1---zuxozusagewolesupekobapog.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/nefozutevarunuw.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087954f46d0a---gonanumegig.pdfIn PDF document text
- http://gesundezellen.de/neu/userfiles/file/teduvixebegabunijisowexoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dil+chahta+hai+t%C3%BCrk%C3%A7e+dublaj+full+hd+izlePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ebb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBB0	16164 bytes
SHA-256: `fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467`
`font_01_sfnt_off00010122.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10122	19060 bytes
SHA-256: `bc81bd18285781ee76c0f2dd5e09254fa260e41ef5a7b8bc7939ec459be276ed`
`font_02_sfnt_off00012f75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F75	11096 bytes
SHA-256: `6967bd26bba8fb3f127845ba98f5a34ee25e85cd8664dffb4903809b37ad7569`
`font_03_sfnt_off000148d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x148D6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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