Malicious PDF — malware analysis report

Static analysis result for SHA-256 322b70d70d53e746…

MALICIOUS

PDF

77.5 KB Created: 2020-11-20 06:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 49f26937729718bf9b055083046ca773 SHA-1: d7b7a0c1260489bf46b32af342b191288467ce26 SHA-256: 322b70d70d53e7461c1fd74ee7f4db59a477949229411d369f596d0ea9efbab3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=law+of+exercise+thorndike PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f8a4f318c33b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f923f12350e3.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/036c8.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/lolijexejomak/brake_caliper_guide_pin_grease.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/dewibelesomet.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/file_cheat_koin_dls.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/letter_of_recommendation_for_former_athlete.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/62288269837.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/disney_emoji_blitz_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/advances_in_food_biotechnology.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/concurso_prf_2017_edital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7878579-2be3-4633-a73b-17d5c9da4f06/40808393139.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1C 4716 bytes
SHA-256: c579e15f12dc173ddc3e4084c9eb069ce07accf9b7a6e76980359c18dede8cd5
font_01_sfnt_off0000db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 5244 bytes
SHA-256: 3a5d32a494eb430d4db810229cfd96f5eceba28e27bba75178c5b9920b8149d0
font_02_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 10544 bytes
SHA-256: f0da98cb59d932d19f14ae5d7d2f1dd31620ef66778e7b4b7f570b1a5761c65d
font_03_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16684 bytes
SHA-256: 4fb18f2f8d176c0c9ddf893a3a69c6eaaaf8ae8309617b6e07033971a2ed751b

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