Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce485ec3d0c2e381…

MALICIOUS

PDF

83.3 KB Created: 2021-03-27 20:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: feba7e82447e080455fade52c34dc6e4 SHA-1: 5112395b90a68a25a45509a92a6bb8dc9610393f SHA-256: ce485ec3d0c2e381da7dd2158d59bfb1ad687ac0ad4eff136c41a71a97de4638
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://pelibifir.ru/wix?keyword=edenton+high+school PDF link annotation
    • http://baxusajatos.sportsontheweb.net/ajax_full_tutorial_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412391/normal_5fe22d717a1c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fdd72b271d78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ff655919bec5.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/LOt9hct/scentsy_nightmare_before_christmas_burner.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/angle_bisector_of_a_triangle_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_605c5d0b1fddd.pdfIn PDF document text
    • http://sikazigazes.mypressonline.com/cechy_podzielnoci_liczb_naturalnych.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/gTibHgg/hornblower_s_sign.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/hcgdYQY/88857476764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_602b5e63595c5.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/jojitagifuva/ahbap_platformu_eki.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/pitoxagis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccff960-cfff-4ecc-9c80-0cb98411b597/83141659119.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/37286916873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff332300-cf4f-4fcb-8ea3-d6a11d2e0f7e/98341255387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe76d56e-7de1-4a15-a893-1b0654f10ce8/62162281177.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/80720907576.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/moxenanenibibalipimesalu.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/jedaparobifunulida.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_off00010945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10945 4852 bytes
SHA-256: 108c249e0f08d62b9908e96e3700e0480dca1018f42a020a322ef3aca9d30311
font_01_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 11600 bytes
SHA-256: 018c240a213d513a32c7747b15f5dd30970fe3def40853d406a50643f04990c9

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