Malicious PDF — malware analysis report

Static analysis result for SHA-256 4760da0048f289ec…

MALICIOUS

PDF

79.9 KB Created: 2021-03-31 00:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e8709d7813432449d94c19fa5d4af474 SHA-1: acd34711772a622a0f7d0735de885983f7b8cfa8 SHA-256: 4760da0048f289ecae4d4709946156c1befd6d9ec5487778b395cb558073dc56
164 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. It uses an urgency-based lure. 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 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=acer+aspire+one+zg5+battery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5ffaf2b090c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5fd1ce1be1f16.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/05086e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_6045814a5f97e.pdfIn PDF document text
    • https://xegunato.weebly.com/uploads/1/3/4/3/134315925/merar_rolapadowef_kuwiximisivazax_nixubizej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5ffbd81023f85.pdfIn PDF document text
    • https://tigigedilopufam.weebly.com/uploads/1/3/5/4/135400960/61c9d.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/lorifawuvawot/soviet_anthem_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/xapepivofiwojubesiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/47514356458.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/how_do_i_use_my_sony_action_cam_as_a_webcam.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/agenda_mercantil_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/minecraft_aether_mod_1._14._4.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/fewujojaverakadilutuv.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/69894779036.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/comfortaa_light_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/selected_information_substantially_all_disclosures_omitted.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/badajazipowupixali.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/8487875660.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 8

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_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 5476 bytes
SHA-256: a299ae3c169a2d2ae07bd686e2201119955c6b5a4ad1a3b1fff5819da8b6eacd
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 11044 bytes
SHA-256: c3b73e27aae476c825617cfd39c6de1e62d97c63c23f4b727c1eb6263ffa49a0
font_02_sfnt_off00011cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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