Malicious PDF — malware analysis report

Static analysis result for SHA-256 269f471d7ac99169…

MALICIOUS

PDF

73.4 KB Created: 2021-03-31 17:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4f84879ed6167559ca73b66e86208f3c SHA-1: 30d09a6eb24df70c1cf552cd2849225c7b15ca01 SHA-256: 269f471d7ac99169e4152bf4b90a2bcbb04d52d782a1c1964ed25efa84887fcf
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a redirector link to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/strik?utm_term=hey+black+child+by+countee+cullen In PDF document text
    • https://cdn.sqhk.co/wofazexej/gehgjzV/kotak_securities_online_trading_guide.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/11738522299.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/mice_brain_atlas.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/discuss_the_importance_of_the_government_of_india_act_1935d0dfo.pdfIn PDF document text
    • http://poruzotosiku.getenjoyment.net/zasozatosoz.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/bhdfThg/baguio_tour_package_inclusions.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/89625068921z510c.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/91842458195.pdfIn PDF document text
    • https://cdn.sqhk.co/duxapotor/YQfLmUb/74881868696.pdfIn PDF document text
    • http://kittyplay.online/elvis_presley_movies_torrent825cb.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/katizur.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/50906182823.pdfIn PDF document text
    • http://ogranicbio.space/occupational_health_psychologist_salary4rd6w.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/waterpik_water_flosser_cordless_select_review.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/jbCPrf5/does_coffee_increase_blood_pressure_long_term.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/IgiLlij/86798716222.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/pioneer_deh-x3950bt_manual_espaol.pdfIn PDF document text
    • http://twobigs.space/vertigo_khalid_sheet_musicdqdjy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_78ba1cf2a682426bb6eee90d03b9458e.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_322e427ee51c484bb5da311328db8ea5.pdf?index=trueIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_b686ca3b65fe4687b6b124038ab9607e.pdf?index=trueIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_2199d4eb67504389a50ac9981c1e6242.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_off0000e279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 5020 bytes
SHA-256: 57e6781c6ee49f3936df47e4a78b112afe6c1907454140fbf60b487112dacc94
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 10892 bytes
SHA-256: 2d3ef906c8dd7a36615e26d38f92737cc8fd1861247d4052e8668614d10819ea

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