Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4804757c5c656b…

MALICIOUS

PDF

87.0 KB Created: 2021-03-16 20:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b9bf09a58d7e66d598b2eaba46fbae50 SHA-1: 9a4eff7c72f2945d3eacea18c987de1e86fb80b2 SHA-256: cc4804757c5c656bd16bbe3b591922f7d763f7f51648b6537b727cf350a3acc6
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs pointing to suspicious domains, and a high ML classifier score along with ClamAV detection indicates malicious intent. The document body, though heavily obfuscated, suggests a lure related to educational content ('Position time and velocity time graphs worksheet answers') to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://xezojetit.ru/wix?keyword=position+time+and+velocity+time+graphs+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601389670bfc4.pdfIn PDF document text
    • http://profyhouse.ru/asp.net_mvc_4_identity_tutorialt5nnf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5fe492ea876e1.pdfIn PDF document text
    • http://getliterate.online/47117068349sh8ib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_6003b6b31e93e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411479/normal_5fe2d184cfbf9.pdfIn PDF document text
    • http://raffle.website/strategic_planning_for_nonprofitsnkqth.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/sony_dav-tz140_remote_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6045f4a6e6015.pdfIn PDF document text
    • http://verifybadgesbusiness.com/migifolaxulupojisaxutodqodp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_60201c0f15a9f.pdfIn PDF document text
    • http://petersikdar.com/87981142388v7gz6.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/85792759295.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/iupac_nomenclature_of_functional_groups.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fe6f19b02276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_74973b15c4714d3ebc451dd0d72ce31d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/92387995821.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/40417797024.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_2c37968eb2a3456a8c0a391d7bea037e.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_d61a6f69626f4df6b1823a061195c20b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/pisibigarokiwok.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/santa_letter_templates.pdfIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_759cdfc82e3d4f509455360c1c0f6360.pdf?index=trueIn PDF document text
    • http://ralirajuz.atwebpages.com/66524227338.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_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 5808 bytes
SHA-256: 0ae99d810c247c79b7a91b84153161d331568b5c45ae34acfda4c610782a2a96
font_01_sfnt_off000122c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C3 12780 bytes
SHA-256: 938a4a6e0188e4e915d1c6a2f252b6d247416a580b73bb8de7608a1a07e28604

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