Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4346a169a2622e…

MALICIOUS

PDF

83.6 KB Created: 2021-06-29 08:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0b8d534a2dc79f03be8093b6ec2b1da SHA-1: 5976d6b9b20c4ff8ed481beaf2c33b4daa0eb156 SHA-256: 2c4346a169a2622e7bfb68d44ede5b23633261ff22b53d7f0058a0082d2a0195
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=how+many+sentences+are+in+a+short+paragraph
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986e1f204dd---danonotixovez.pdf
    • https://morabia.fi/images/file/60931695367.pdf
    • http://araonline.hu/uploads/file/34619640302.pdf
    • http://oio.cn/uploadfiles/files/65374750556.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ba33f9a9802---xavikobazixazuwopeget.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/0el2b0cc1bfivjibu0ep7s3thi/21334747312.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cgfamf0j8nldi648pk56pkm751/lagin.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adffd36c4---gusatavodevegewok.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/i9i5mc6lg7t9cq42n0lhh07c00/tawolosemusuwo.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609569fbd71dc---pajowuvewazezifuveduxusu.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608bed417c6f8---54858171928.pdf
    • http://richmediahouse.com/admin/uploads/file/91333608479.pdf
    • http://lso-msm.fr/userfiles/file/kovawinixujo.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5081834b80---43897058704.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr57o701u8honlmh6lja3vjh5u/76658496329.pdf
    • http://shinies.ru/img/lib/file/kuxoxazasefop.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/32a9f86b17ed7e92643532de492d50d4/biwirepimerija.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ntt2jmb53te1sevstjmmfrt3uq/fedup.pdf
    • https://fenixfalt.com/userfiles/file/nekatiragizivutokufiban.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7fcd9e9ed6fb84697fa6c836d6760c8e/buxaxeletapemusep.pdf
    • http://amctop.com/board_data/editor_img/file/202105130633.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/1db40952c5475b58a53ba19f24396bdb/xinumavafazapowudapas.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da8d274ac9e---kikapabidafulaxusupep.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078e2bb7aef5---sugutuduzufejo.pdf
    • https://allcreaturesinc.com/files/files/zafutadikonaj.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_off0000e5d1.bin
f6870acebc622345360b46e1f0d65490ef93f93ae378b1e02c81ad16299317f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 10968 bytes
font_01_sfnt_off0000ff23.bin
f3e83d047d45b45e492289777a45548061cc3190ef2b7e6af76aa71274344a11
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 16152 bytes
font_02_sfnt_off000128c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C9 16792 bytes