Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6be4aa61291d675…

MALICIOUS

PDF

83.3 KB Created: 2021-04-24 12:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 75da4074b199a48e7296637c19a8a4bd SHA-1: d9e236426ce0c7a2f33be2b1b8b13374d6297a3e SHA-256: c6be4aa61291d6752ac613b87e5d8a769e51000a0e4ee4516efc529970b82c39
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV and an ML classifier as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many of which are hosted on dynamic DNS services or free hosting platforms, suggesting a link farm designed to obscure the ultimate destination. The document body, though heavily obfuscated, appears to be related to search terms for popular book titles, likely a pretext to draw users into clicking the malicious links.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/strik?utm_term=saga+harry+potter+libros+precio PDF link annotation
    • http://redanixidofax.iblogger.org/apprendre_le_russe_lecon_7.pdfIn PDF document text
    • https://pavuxutekukos.weebly.com/uploads/1/3/4/7/134704216/8513844.pdfIn PDF document text
    • http://duguvazadiwifu.22web.org/assistive_touch_for_android_not_responding.pdfIn PDF document text
    • https://fibetenozogu.weebly.com/uploads/1/3/0/8/130813768/2554229.pdfIn PDF document text
    • http://static-start.top/601318309936tb7t.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/8249270.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/nananugajuz.pdfIn PDF document text
    • http://nenusarawamis.22web.org/hamilton_beach_ice_cream_maker_68881z_manual.pdfIn PDF document text
    • http://1xbet-registrat.site/sekekogofepvunhj.pdfIn PDF document text
    • http://taptopbot.com/free_editable_creative_cv_templates6wk2x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/walepolebulijatik.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/vanaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f759ced1-d0fc-4af7-a800-3a013ef195c7/vozemuwafibubujop.pdfIn PDF document text
    • http://wowekujefabog.epizy.com/lidedavumokibotagoroki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16786acb-1505-428d-88cc-4b7acc625372/14091672793.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/87507543582.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/89875580985.pdfIn PDF document text
    • http://melakevejemi.epizy.com/takanezumovutevegi.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/counter_strike_1._6_no_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/general_caste_10_reservation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/kegigizetoborafomonenejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601b50f3-167b-4249-bdf2-734277d2aa65/guxijagubevereriga.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_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 5540 bytes
SHA-256: 0e2df54d5509da3ab240513f34a1963dcd96cc9807c8d83e00528874cb43606a
font_01_sfnt_off000117c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C5 11680 bytes
SHA-256: d0b291cd59df6c49979f40c37e1b760d421faeb60fdda56b7687467bd2c7186d

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