Malicious PDF — malware analysis report

Static analysis result for SHA-256 d660bca703ec3be9…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 06:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 55c5a6c69b7a78632d39ab7756756670 SHA-1: b339f1eae737af7e17ca10ef5d3acd33ceaaa911 SHA-256: d660bca703ec3be9f0e916bd024d92384986f6f38462c6a054e201b8eb8ef049
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/aws?utm_term=how+to+fix+ice+maker+frigidaire+youtube PDF link annotation
    • https://rokaxitifefisol.weebly.com/uploads/1/3/4/0/134040577/6909788.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/7e2f4b968a135f8.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/33328071fc3b4.pdfIn PDF document text
    • http://com-signto6.xyz/25157424643w9ang.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/getutodonutusoji.pdfIn PDF document text
    • http://anyita.space/gobuxixuloru1lemi.pdfIn PDF document text
    • http://twirlini.com/android_obd_app_freelkove.pdfIn PDF document text
    • http://jsexj.fun/grand_grimoire_portuguesejrfw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rapuzivawa.epizy.com/cancer_de_prostata_urologia.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/bitlife_app_won_t.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/gixogerevo.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/juwubofalominenukobakaxog.pdfIn PDF document text
    • http://xisebugiraji.epizy.com/dorutoviwasijawuvusiv.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/27911920199.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/30626800914.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_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 5560 bytes
SHA-256: 6ca970df224f0a40f12aebb2c0ab471480985b7c1a890809f5de768ac16305bc
font_01_sfnt_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 10228 bytes
SHA-256: 7cc383eba3c3d51356ad967a419bdc7884e6e4b3044e52ae6484e0ada1a80502

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