Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca116a82ff2cbc2…

MALICIOUS

PDF

98.7 KB Created: 2021-03-28 18:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2dd80eab4932ef10c895cb28c285d68 SHA-1: 877462eb8347623134a1b4b7fb51e0ecc81eb4d8 SHA-256: dca116a82ff2cbc2340194c0ac73c1367fdb9a4c062203ab5ca5a4c630d95059
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting or are part of a link farm. The document's body text is heavily obfuscated but appears to be a lure related to 'Stephen Hawking books in Marathi PDF'. The presence of numerous external links and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=stephen+hawking+books+in+marathi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418000/normal_6056f236b5478.pdfIn PDF document text
    • http://peteferix.mypressonline.com/sizedeguvugaxo.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/jirapa-kabodax-mulaz.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/walmart_ps5_sku_number_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/bjdifhd/idea_free_talktime_recharge_code.pdfIn PDF document text
    • https://wijununag.weebly.com/uploads/1/3/1/4/131438003/ruzilalugaga_webed_vofofusokax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_602b3fe6d5daa.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/cylinder_volume_worksheet_kuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_6027219ff3d73.pdfIn PDF document text
    • https://cdn.sqhk.co/rifasidajika/nhhNFge/96991358424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5fee1e83c66e9.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/27TibXy/dr_driving_game_online_play_now.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/WvjdP20/jiwarotab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_601bd4c947e70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe28534aa75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_6057e2032a257.pdfIn PDF document text
    • https://masiwirisiniziz.weebly.com/uploads/1/3/1/4/131453333/kubuzemutuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavadot.onlinewebshop.net/61815190586.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/mack_e7_engine_torque_specs.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_off000142bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BC 5824 bytes
SHA-256: f79d39c8220784aafee1cc52796fc4b0d34ba8e067292bf6b90e5ea68e3d3e05
font_01_sfnt_off00015667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15667 11504 bytes
SHA-256: 06fd19e3b0b9bccfc6fe9c9728957ac4e5cd7c18fec3af2a62c5e02de967cc97

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