Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd36e260b98bc9b0…

MALICIOUS

PDF

73.5 KB Created: 2021-03-08 21:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 04d10e688b765c7c90068990b645a622 SHA-1: f72611b056547e5a4823224e0b41f02a4b95a50d SHA-256: cd36e260b98bc9b05bd080982894e6d750656299704c7e9428665166cdf2dfb5
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains links to known malicious redirector infrastructure, specifically 'https://crophysi.ru/award?keyword=the+odyssey+pdf+download', and employs a deceptive 'download button' lure. The presence of these elements strongly suggests the document is designed to trick users into downloading further malicious content, likely through a phishing or social engineering scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/award?keyword=the+odyssey+pdf+download In PDF document text
    • https://xajobukemuxup.weebly.com/uploads/1/3/5/3/135398270/9095136.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/a_christmas_carol_script_short_version.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/c8a3cd975.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fff69dd37728.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/47306002803.pdfIn PDF document text
    • http://mobevusujezuno.22web.org/simple_english_grammar_book_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_600b74818beb0.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/kuramasilaketokoleso.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/setaforarax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_602b41f3156fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rofuvawitarul.atwebpages.com/fluke_435_power_analyzer_software.pdfIn PDF document text
    • http://sabozovitebem.rf.gd/davutagefewonap.pdfIn PDF document text
    • http://vulebodifoguvar.epizy.com/refonabigosofawusalumun.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/what_was_the_point_of_letter_from_birmingham_jail.pdfIn PDF document text
    • http://lugirike.epizy.com/vans_plaid_checkerboard_old_skool_platform.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/sasapewobupizujaram.pdfIn PDF document text
    • http://furugavasipif.epizy.com/aaj_naiki_bahuriya_nache_hd_video.pdfIn PDF document text
    • http://xuwewajefifa.rf.gd/bose_wave_music_system_bluetooth_connect.pdfIn PDF document text
    • http://kasupitebuse.rf.gd/the_things_they_carried_chapter_19_quotes.pdfIn PDF document text
    • http://posinumufupe.epizy.com/bobunivozut.pdfIn PDF document text
    • http://fopijokukipi.rf.gd/does_kenmore_coldspot_have_water_filter.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_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 5176 bytes
SHA-256: b68ff61247c54cf6cff7de33f0fafe8db48a6237f750c1203a7218c64ef03eb2
font_01_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 10272 bytes
SHA-256: e8ec5cbdff05014298d4bc159197d81cf109741829f76e88078c984cad2601d4