PDF malware analysis — malicious · 410c8a106648fe75

MALICIOUS

PDF

91.8 KB Created: 2021-09-04 20:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: f36d9a83c739d21de2b886d3b61d6df2 SHA-1: 62c9f853436975c2a71ae17a94b40d771f2b9773 SHA-256: 410c8a106648fe75b5a0674999dd54108eb8f461452192ae52ada05e2ca7971c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the presence of these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://uleshuzataruhaz.hu/files/file/lokipeviram.pdf In PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/e1a23150c44d65e668c2a781d1b700c1/63409546245.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e184c65ba---binozatukediloz.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/d8966858742296df3e946903c8fa4e41/25148828119.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8a77f4177f9a421b59eef30b2ace8c37/bakulibofuwabixixiz.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/93a1c80ab107c0deac388c14715e0a80/70300805301.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/4ddqioiko7m17hnquqc2a4688e/rikuwupake.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/tudiwidopu.pdfIn PDF document text
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/mopanimere.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65e1e8e09a.pdfIn PDF document text
- https://angkagenap.com/contents/files/82759004482.pdfIn PDF document text
- http://tomekorea.com/userData/board/file/totaroxobasinotow.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c623b83d258d67c4a183e318c22c7882/71721847961.pdfIn PDF document text
- http://victoryelectricalsupply.com/ckfinder/userfiles/files/zomifu.pdfIn PDF document text
- http://czytamzezrozumieniem.pl/userfiles/file/3959910882.pdfIn PDF document text
- http://abnicum.com/files/file/7760246323.pdfIn PDF document text
- http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c681c26cba5---53875201686.pdfIn PDF document text
- http://www.centralperdana.com/file/fobimirugisozafasosasu.pdfIn PDF document text
- https://people11people.com/uploads/File/3202693993.pdfIn PDF document text
- https://munis-roquesalbes.cat/demo/vilalba/imatges/file/gesudikaperejazetubed.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608103842badd---17538679776.pdfIn PDF document text
- http://wellgroup.cz/UserFiles/File/61532796884.pdfIn PDF document text
- https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/6843456ad785efa5eeda6b6506ead700/79876145820.pdfIn PDF document text
- http://studiopol.it/userfiles/files/lutusosit.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8c1b5f1f87c27f4c26fdefc333e993e9/13530023884.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=les+grossesses+multiples+pdfPDF 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_off0000fccc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCCC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000114e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114E3	10632 bytes
SHA-256: `cfc0428a254666beb73e132c8b1b00ff115e2f18f45ed2d3ec1729f1a343ff3e`
`font_02_sfnt_off00012d01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D01	21280 bytes
SHA-256: `56c9d0e62ceb3a71b295a99a05be64af0d0330111bb797468667d0f2bd381bbf`

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