Malicious PDF — malware analysis report

Static analysis result for SHA-256 db235ccff536b172…

MALICIOUS

PDF

78.4 KB Created: 2021-03-17 05:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 145c545a3af704e8b410a18f4286a2da SHA-1: 215248f6d8d62ddadd7d26d9da064b26209f0fdf SHA-256: db235ccff536b172861af29ba791aa745be1e74bbcde4089a5f4a85412ea144a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains numerous external links, forming a link farm hosted on disposable domains, suggesting an effort to obscure the ultimate destination. The presence of a 'promo code' lure, combined with the high number of outbound links, strongly suggests the intent is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://resalured.ru/wix?keyword=bonnaroo+2020+promo+code PDF link annotation
    • https://digojumowixev.weebly.com/uploads/1/3/5/9/135989627/3104792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5fe60e34c2c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_6031c89204b7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fdf91c26087a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fceef78af253.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/ma_rmv_replacement_license_plates.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/kenoxiwegejumurufaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495240/normal_6048519a74432.pdfIn PDF document text
    • http://favokumigo.iblogger.org/31060113918.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/navosimuwolowinapete.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/a_day_in_the_life_beatles_piano.pdfIn PDF document text
    • https://posapana.weebly.com/uploads/1/3/1/4/131454172/b0678ca0a815657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_600ee7fdedb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_602d457c76afd.pdfIn PDF document text
    • https://sigiduba.weebly.com/uploads/1/3/1/3/131384121/9737294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5fdf3dae4b4b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_601a86a7032a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495858/normal_6040dad55deb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibemodida.myartsonline.com/lefovirasojudoduken.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/schwinn_airdyne_exercise_bike_repair.pdfIn PDF document text
    • http://vivanosagilule.rf.gd/inorganic_chemistry_by_james_huheey.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/xezujiworifimutudutebate.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_off0000f28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 5332 bytes
SHA-256: 564b56fdcee4e491bf66ea3f822d6d36134ba80354d0debf0960a223e883bbea
font_01_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 11200 bytes
SHA-256: f11c7186efe7a770ed04ab38935521e897bef4ae5527f620b417aede97140c33