Malicious PDF — malware analysis report

Static analysis result for SHA-256 180a0b7752902979…

MALICIOUS

PDF

84.1 KB Created: 2021-06-30 02:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a95426652ed7e32f6b0d2c456849280 SHA-1: 76371c209468f14176f77aa68e670d8be444af37 SHA-256: 180a0b7752902979e16e5d7cbaa10961b9dd7d3fa35a2c42d078ecbee9d5256b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a campaign to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ib8b9qf5dknje63o7qj4jvdm66/wujupajibufekakupijugam.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/23868496847.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73404e2174---97785707258.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mrvd8mcp6g7vl83o8i5cgmnunt/68806655602.pdf
    • https://drlanda.hu/user/file/26929966690.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f58f3ca130---tijodusewovol.pdf
    • https://acronimocostanzo.com/userfiles/file/48369906302.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607714562cdfe---3994844089.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nillqq3nmmq5ttt8v6ejc84mt6/fuvaxixudurajofaposoj.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607016f00af14---bekamojadat.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3a5ejnn4bv3er0i7ipnh5i3s77/35568114564.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0702e4a87---68548973368.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc0a68fcf---54362138891.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/dd4ed8e973079631219939fd30565db1/kimizutuwero.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7d58feee3a9b594f78700e36b4d744dc/zubujamexiduzukenigagenuj.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d357815bd45---31305123191.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab882685a96---disetotekoxusivafilu.pdf
    • https://steklo-shik.ru/userfiles/file/dumokakutebidavobituvima.pdf
    • http://alptw.com/images/files/54171504595.pdf
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021060110461880554.pdf
    • http://henri-ruch.ch/doc_pub/file/kelunebazelulezurugos.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d854054d710d2596bde24d795fcefab4/zefelosedupikan.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea503e429a---90844535158.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/d8kfa0fo1n19r74qk436jo0frr/pilejukorinokuleridow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+play+munchkin+harry+potter
    • 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_off0000e467.bin
330a6d1448895a4c9c6595d31ab4801761808ce3760123b4acbc054cc55a62ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 10852 bytes
font_01_sfnt_off0000fd52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 16792 bytes
font_02_sfnt_off00011564.bin
ef1b40ef64e07fe2aedfe56b5acb48ea26a3c4a3f57f30731423df1bf72beb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 17552 bytes

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