Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7b9ac2c205fdfe…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 03:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c88c86dd9d494a96bddd1c93a9505fb SHA-1: a503c3aad9993f02fb63fe78299a794ae2437802 SHA-256: ee7b9ac2c205fdfe3f07a75bcc5efc3d329cbe18c1720b5451062e51bc2f26f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious PDF detected by ClamAV and ML classifiers. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use WordPress plugins for file uploads, suggesting a link farm or phishing lure. The PDF's structure and embedded links indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wastran.ru/uplcv?utm_term=my+love+for+black+colour+quotes
    • https://discoverthesky.it/file/24744906898.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad833283ab7---18787686928.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081037da67b8---86054854003.pdf
    • https://alternativecarrepair.com/userfiles/file/nireduminam.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c84dea70dd1---96886571098.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/86692618152.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/fjjjfun91r6kr9lh82jkq1umqn/26130592737.pdf
    • http://cephedanismani.com/images/pages/file/waminivu.pdf
    • http://gazosilikatnn.ru/uploads/files/66173791262.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608590c56983b---peneloxedizineti.pdf
    • http://nesthomes.in/userfiles/file/xuwuzevoxikolewufita.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/llmftbi04fljqn4hp71alhokte/74875603636.pdf
    • https://webtechnocrats.com/upload/file/61811610900.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/j6bc2p4adaaafmsoupd67vr133/fagimabusigekipoturom.pdf
    • http://formel1vermietung.de/userfiles/file/55453277544.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70ded519b---88463808942.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5617c57ee---siganosewo.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/eac03709b14392665a714f7f44b0fa7e/21409195575.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160920f0ddaad0---10233868595.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/qqrl1g82gcq3lqj99qpisfc48r/86586017882.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/op9v85mb93e5imb8o8ottu8ivs/28674335104.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dae671a3e---85550692109.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/tedafofa.pdf
    • http://sushiosushi.com/uploads/files/mifezuwaforipoxatilaw.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c36ea03af---50925438485.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb3.bin
cc172ed1567410bc94b1954ebf825e8646c160cf7b5ac41f4f6beeb9d12e15da
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 17260 bytes
font_01_sfnt_off00011c79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C79 16792 bytes
font_02_sfnt_off00013490.bin
37a2cdb6bb55daf21b8414b667788eb3ce6388ed4c8a4d97cb8e6d1df7fa4e76
pdf-font-stream PDF embedded font (sfnt) at offset 0x13490 10784 bytes