Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e277a336958237…

MALICIOUS

PDF

78.3 KB Created: 2021-02-12 18:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d105768fc32a8347ffe047941cbb46e4 SHA-1: d9f43022d14346f753042253a997a1ae34ebacd4 SHA-256: 67e277a3369582373d21f7f48bdb54441a2962eb72ec7db5b94642073528ab20
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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/wix?keyword=geometry+worksheet+8.1+similar+right+triangles PDF link annotation
    • https://cdn.sqhk.co/jeforije/jjiioyx/facebook_messenger_not_working.pdfIn PDF document text
    • http://idealicaufficiale.website/vrse_batman_vr_entertainment_systemohdri.pdfIn PDF document text
    • http://republvinb.fun/guvewvgr42.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/cVGhaij/light_up_garland_for_stairs.pdfIn PDF document text
    • http://torchland.xyz/lords_mobile_colosseum_guide_2017fpvcj.pdfIn PDF document text
    • https://cdn.sqhk.co/zomitokemip/4iblJid/handbid_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/geXnShf/vector_field_definition_mathematics.pdfIn PDF document text
    • http://jobauthor.online/didexujal69co.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/5KIgiNF/21517758474.pdfIn PDF document text
    • http://creamwalls.online/how_to_sell_poe_tradecv2ud.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/dz8hdn8/ghost_world_comic_book.pdfIn PDF document text
    • http://pubggaming.online/coat_of_arms_template_blanko22j0.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/fefurorobumi/kibidexode.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/12277395076.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/free_printable_year_5_comprehension_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/91651097246.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 5664 bytes
SHA-256: e1d7ecd71d907c11e90c668642311926ff329a6cdd6bb7a8dd03ad86900e27c9
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 11024 bytes
SHA-256: 86a1c3d75f25502bded5094067115235394931b109c975da70ad437389a447c6
font_02_sfnt_off0001168d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168D 16176 bytes
SHA-256: 7f10b0c358be1a4863a2a982902bd2a9d16bc77b40922c2b9e87bd3995e2e9f1

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