PDF malware analysis — malicious · dc53613930050dbd

MALICIOUS

PDF

80.2 KB Created: 2021-06-10 09:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 35e5723a1bda42a574e5754b871f1f4d SHA-1: a5b4dc9026c6217c9f0548b5618cbc10755bb809 SHA-256: dc53613930050dbd7bdf9d3be9a2bcb690874454826d19910e0e3290197aba9e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body itself is heavily obfuscated and appears to contain metadata related to 'call of mini zombies mod apk', possibly as a lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=call+of+mini+zombies+mod+apk PDF link annotation
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ontlipnl85e89sgblifk7t61pl/gegotujok.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3368d9747---dotuporumarazomepa.pdfIn PDF document text
- https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/742e12752126e0d1993115bcec4fa028/35235565475.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-5/file/merejupapugimoligizevaw.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bca37ebbeb9---22220850715.pdfIn PDF document text
- http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160770bac57567---96894127325.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/eef0bd46d2bf9df0a8053a85d0d7a01f/70610633444.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/59e567fe70f8a357a1363f4ab55e8ee5/7311669442.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befe4d0bbe6---80991650862.pdfIn PDF document text
- http://busankid.com/webfiles/board/file/%5C/23022170577.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/72234281544.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8fac8a53d---zawadaxiruxukobinotam.pdfIn PDF document text
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f15ce7e38---17844487105.pdfIn PDF document text
- https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/020b5e454eb9d317e8ff9aa1a9292d1d/ferizufalewolekulejesu.pdfIn PDF document text
- http://orsolyajuhasz.com/ckfinder/userfiles/files/wavuwazodoxuvixexopo.pdfIn PDF document text
- https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/jvrgjqembbsce5rv6r4997jmsj/zaxazaso.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6d783b8e0552943c3189f0d9c7f6e4c3/zozigezumiwojedepugaren.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12fff85c9e---14761303104.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE21	2880 bytes
SHA-256: `ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e`
`font_01_sfnt_off0000f860.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF860	5248 bytes
SHA-256: `5bf40376baaaf4616544619818969663c86a80820082b6998845b34575f5762f`
`font_02_sfnt_off00010a2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A2C	11960 bytes
SHA-256: `49e0b32ebd9c9846f414f32ec96aa5aa1d63d1e5e010e2d9a831e1c716c50db1`

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