Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a0a756a49a818e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 17:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6a3c8d7f4d331878657ae51bc2e70fa SHA-1: 52d3e512641895bb8d42f444dde0b462dbb6554b SHA-256: 02a0a756a49a818e9e99a0943b47cb81ff9c26ed0e4b25d757b0227bcebdaf48
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, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress uploads and other disposable hosting domains. The primary goal appears to be directing users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://popnmusic.fr/userfiles/file/47660972668.pdf In PDF document text
    • http://hrt-foto.hu/_user/file/buwogubuzutofanod.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/65131879084.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/33939246680.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/wunibileraroniruden.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/sajawejetuteled.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/pobunopawejosapelav.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/33172663038.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/devupu.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/4597230506.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/piduba.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/65479019225.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/58336970343.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/14121821194.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb85086583---37611747950.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e9861f24---55158084180.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/siremozoxu.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/kixijojosejejufagizugujed.pdfIn PDF document text
    • http://mousike.it/img_ins/files/46549222756.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b294be9eaff---mofefogaberav.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/zamipijadoweta.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/ebfa6e29c21b1d031ad375f3bb8fbca2/rafasikibeditoroguloked.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b66bdd960909328102c788d8f99fc2ad/zisosesuremaxufa.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/16561619203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=scientific+method+story+worksheet+answersPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 17156 bytes
SHA-256: 59c88d5ac400663f348f8f0166f5108b8db13f9ced0ee179ee8610f703ee7631
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11060 bytes
SHA-256: 39430a8e76373ac1fca20d6372a067324184a6e4eec28e6593df43d251e5bd00
font_02_sfnt_off00011c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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