Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd47bbe82b841c6…

MALICIOUS

PDF

125.0 KB Created: 2021-06-29 02:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f0daa9e7078bc2e2d4d6be3c0830fc4 SHA-1: 045701325a7b9eb3fd9286ed85b6fc1e8da2f876 SHA-256: 2fd47bbe82b841c6bacc8b9c4a7b3c3b8f95742d828f99446fa8851c4d486ad1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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 http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a278348412---12986864835.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b9423712e---pusaturituselupag.pdf
    • http://best-infosystems.com/userfiles/file/kowibesewumurarinix.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ltq6kfkb6itpcpa71dr0vqcrjf/5301281417.pdf
    • http://placc.info/up_image/kewipixoxipimizuroze.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2fff661a7---94152273778.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2897b11951---51230269694.pdf
    • http://nebovsem.ru/app/webroot/files/files/daleduvuwavoza.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/287fe32f8dad4fd084a6a997601171c4/68913839639.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be751c7ca---88696659812.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/s763ofk09i2g33fdkv9upepe97/xulivurolezut.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/jagulejapofotedemur.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6cd30b928---xogetowesipejejulixisa.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/2a724ad7f4949c9bba1519db2138c99b/54662409597.pdf
    • http://penzionriverside.cz/files/file/85201692982.pdf
    • https://netpage.info/userfiles/file/74087756089.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f22f95387---kuzisuxasozade.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a72af5653f1b16a5206561a34e57400b/75049325198.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a46e284a0c7---2736641762.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ef0a62b44cbce8897743ea477bcd23a6/fatomujame.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/unv23onmj0840o25sdocfm8pdh/94098303890.pdf
    • https://baxsporthorses.nl/userfiles/file/67195591149.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b81d6dcd0e---21308074504.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7c2d5e8e9---jotewefubiduwokopogolaxis.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af9b9359edf---40854365405.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/941b508a1ebae7925a52abc1eed2eed4/besanesizefom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=harry+potter+deathly+hallows+part+1+release+date
    • 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_off000184df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x184DF 16792 bytes
font_01_sfnt_off00019cf6.bin
085c207c50dd9aa6ab04d91abb079e7c88aa870c542854cde6636801163e7645
pdf-font-stream PDF embedded font (sfnt) at offset 0x19CF6 10536 bytes
font_02_sfnt_off0001b536.bin
60044e8744037ecfc04d3e65d58af7f61e906ef87d85e970d84acb9a4f55c7af
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B536 18496 bytes