Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63e2e78b767ea36…

MALICIOUS

PDF

87.1 KB Created: 2021-03-02 20:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cc7cad223998f03c54975018b0e86907 SHA-1: 88425aba0921e0fb3c338a8b60b1281db089aa28 SHA-256: d63e2e78b767ea360cc6b19fb06c2f0029605153fea79e65fc9aca89005487fe
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://crophysi.ru/123?utm_term=job+description+for+digital+graphic+designer PDF link annotation
    • https://cdn.sqhk.co/metexemoraga/ahdBwji/vega_conflict_wiki_bridge.pdfIn PDF document text
    • http://petersikdar.com/free_lawyer_letterhead_templatesokt0z.pdfIn PDF document text
    • https://xexalidifiso.weebly.com/uploads/1/3/4/6/134685587/tawinemudubapolixogu.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/chfhihf/82167056823.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/tgjhggs/rurakuperuseki.pdfIn PDF document text
    • http://adr-media.work/36681630059wmy7.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/WUWOhih/sssniperwolf_youtube_channel_videos.pdfIn PDF document text
    • http://artistichomesolutions.com/invisible_man_ellison_audiobook3mpdm.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/7828857.pdfIn PDF document text
    • http://hookup154.online/34966180848hyptv.pdfIn PDF document text
    • http://insurancesouk.com/delete_google_maps_search_history_ipadx11y1.pdfIn PDF document text
    • http://1xbet-football.fun/what_do_you_call_a_very_energetic_persontno5f.pdfIn PDF document text
    • https://wibosopepizasu.weebly.com/uploads/1/3/4/3/134332643/2200225.pdfIn PDF document text
    • http://hocostyle.ru/what_is_fiqh_in_islam_in_englishpr1hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/auditor_report_format.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 5544 bytes
SHA-256: 6067518c36fddc7ef1d20630589fca049ec91fdfaa9c6c933b17665c7dfb2493
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 12104 bytes
SHA-256: 820bef8cc594b73fc111ed24d152a29d0b097be62576992a5f81fead327cbab5
font_03_sfnt_off00013397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13397 8256 bytes
SHA-256: 48c801571a27cd394bfeda0ce926d91a6f46cec99a4ca085a6bd6b1302e221e7

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