Malicious PDF — malware analysis report

Static analysis result for SHA-256 011a127ea1e63c3c…

MALICIOUS

PDF

84.3 KB Created: 2021-08-25 21:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b5167199d8d6e6d72ccfdf4e04b29667 SHA-1: aa4a51c748673d3180c5cccd912d1cd06ea6028d SHA-256: 011a127ea1e63c3c76ef80ab2458421d5646ff00ef169fc69fc21339557a29a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, as indicated by the ML classifier and ClamAV detection. It contains a link farm that points to multiple compromised WordPress sites, likely serving as a distribution mechanism for malicious content. The presence of external URIs and the nature of the link farm suggest an attempt to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://cructi.ru/uplcv?utm_term=double+vision+sometimes PDF link annotation
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90ae23b7b---belaxiguzajamanovasifada.pdfIn PDF document text
    • http://sjhtractor.com/d/files/32106714505.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161102be29bf20---rokosoruvebofuga.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/20384b641f5d77912cb4e2ec9aa4ba10/17913748070.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/jijikadodufodexa.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/65054865482.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161134ca066e15---nubejiruxujoteluxujedi.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0cs8v8c8rjkeu82f7iujpeb880/60039586151.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811795a27cd---detusegivas.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/50244701948.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/28558249988.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/qqklsdc4li5ni60g5bo280oonc/40312634679.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/753f8fda6247810ed36e099f3f91fb10/koropifulir.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216201557493069.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ea9825f43---89322863233.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/zukobovazolar.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/8c819826c3c387c1ff1863a89c22b4b8/jilovelipanifajitowus.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/ruwasufoguforif.pdfIn PDF document text
    • https://pepsima.biz/files/file/mipazob.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/50600196915.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-18/20210518102855274018.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd02f7fa44---9879365676.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/07f69213d0b927bdc5738f51f9e8f1a3/90842652433.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1625066226.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/33130720684.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10316 bytes
SHA-256: 0c52b604cc55baee0e5deb5d6dabee57c0c7bb38285135019be983c609fdd518
font_01_sfnt_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 17100 bytes
SHA-256: 21a74690bf47d94b430e627e5018410b2a56ae176359888740be71d8f62f6dfa
font_02_sfnt_off00012bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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