Malicious PDF — malware analysis report

Static analysis result for SHA-256 149356302d4a454e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 20:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f5b7774102b716ee806c7b20e7a8f9d1 SHA-1: 81095fc5ae68de76d6929e4a9647d3ae29d9fc9e SHA-256: 149356302d4a454ef32c69eeabd6bfede3115704eed687907d610e368166e8a1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or unknown reputation domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains metadata related to 'Eliz keto shark tank' and the wkhtmltopdf tool, indicating a potential attempt to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=eliz+keto+shark+tank PDF link annotation
    • http://korsabarca.com/badinerie_flute_and_piano_sheet_music4suw8.pdfIn PDF document text
    • http://zelopaqq.xyz/39152994249m62be.pdfIn PDF document text
    • http://50offshop.pro/piwesawujtrtgw.pdfIn PDF document text
    • http://youla-24.cc/casio_ca53wf-8b_calculator_watchx45di.pdfIn PDF document text
    • http://replyua.site/twilight_forest_mc_1.12.2_3.8.689_doufs7i.pdfIn PDF document text
    • http://eurozone.pro/mastery_greene_summaryelz2e.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/fallout_4_miami_mod_download_pcegm1i.pdfIn PDF document text
    • http://shoplus.info/30_guitar_songs_with_3_chordsy00w2.pdfIn PDF document text
    • http://lawyer-consult.ru/when_did_washington_state_shut_down_for_covid_19yma40.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/a82735cf-0a35-4311-83f2-a24d1a392d30/bohemian_rhapsody_piano_notes_free.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_1af596f605d34d7fb0ef6609917c5114.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/366dce70-9ec5-4ae6-8925-98ac66aef42f/57623178179.pdfIn PDF document text
    • http://baxojusapu.epizy.com/what_if_netflix_series_quotes.pdfIn PDF document text
    • http://dolapevina.rf.gd/foginebaroz.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_e373a158ab1242e190dfbb7bb4d194ad.pdf?index=trueIn PDF document text
    • http://wotanuxofewaru.rf.gd/91154336358.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_101cef9aa5d842adb43f088de47ed4f7.pdf?index=trueIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_caad0deb59944097af173e4bca2e9640.pdf?index=trueIn PDF document text
    • http://lajopagi.rf.gd/lifaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06a4253-5890-4c0d-b98b-da9964047f24/how_to_shut_off_alarm_on_marathon_watch.pdfIn PDF document text
    • http://mugijuzes.epizy.com/barnett_whitetail_pro_str_manual.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_0ac96d14c8d3434088d722d9a1bcef0d.pdf?index=trueIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_84def66fafe94c83b0ac26b4ec02ddc9.pdf?index=trueIn 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_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 4844 bytes
SHA-256: 440d4dffbeafe53c3d088c78122f7a11977606cc06624b41d8c1097e68340aca
font_01_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 11852 bytes
SHA-256: 934f3e8483181b975ae9751890669dac0f67153ab9068a5c9b7b83983db2895f

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