Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f11072a8cc20c8…

MALICIOUS

PDF

101.4 KB Created: 2021-03-23 21:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b6ff231837f43060d4e84a2666cc9747 SHA-1: 65d9d281d940cb201cb500cf4ff15b96de7c53c7 SHA-256: 91f11072a8cc20c81c13616a78e4753ef9ff0af238ba298f871ecbbdc12403b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to game walkthroughs, likely serving as a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=disney+kingdoms+game+walkthrough PDF link annotation
    • https://cdn.sqhk.co/joxesinejag/hb2JjdE/geo_book_1m_review.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/5c7ed5a.pdfIn PDF document text
    • http://hushseo.online/whirlpool_washer_will_not_drainc89ai.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/botosoverarisemekex.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/Shj1Ejg/rovumerutirenasujira.pdfIn PDF document text
    • https://namikefazexu.weebly.com/uploads/1/3/1/6/131606603/bosaziwig-bugozat-mabepatizafopi.pdfIn PDF document text
    • http://samyog.ru/248110353092siag.pdfIn PDF document text
    • http://pss77.ru/beputabexizikumejenefedp5ha.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/ggvBjao/zazuselatop.pdfIn PDF document text
    • http://rezonansmusic.com/jusidogotalovupejupokec6eke.pdfIn PDF document text
    • http://gratoramaa.space/wulonusimurivilajebapa2fyxa.pdfIn PDF document text
    • https://verulofu.weebly.com/uploads/1/3/4/0/134012380/dimor.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/bac7ebeda8.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/lokonapudim.pdfIn PDF document text
    • https://xasopivuzag.weebly.com/uploads/1/3/5/3/135333163/guwesasekuj_mosuvere_naluwexogod_fakezewij.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/VkARbvr/15620807789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d65d547-1228-4187-a6f4-a85c88e10498/what_is_the_concept_of_simultaneous_contrast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d49566a-1c52-4043-a0e1-b3ab01d12f2b/93794191752.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/zogenadedilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18769f5-8b99-4f93-8be5-c91755b3d286/48344437779.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/zogiwamejikasurove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65e3926-0a53-435f-80ae-ddf9fa8622d8/flag_football_playbook_app.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E03 5496 bytes
SHA-256: 478338cef64ef67b57afb1ed1081a0da0965993509628fbead8efcd7ee158a4f
font_01_sfnt_off000160a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A7 10884 bytes
SHA-256: 675b701f361a177ec962fe8d90dc95249433fc3c2ece8c3da76d04f8395faeda

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