Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a58a6bc695edc1…

MALICIOUS

PDF

102.2 KB Created: 2021-04-04 08:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a235cfafb6e8ca334b339af845950553 SHA-1: b5ffe8e64248ee2e7bd3bd10d3eecfbf8127a7d0 SHA-256: 60a58a6bc695edc16e222ca7b78cc72f56cd1c2e311cc2ba5416339286de8456
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 0.9995

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://druttle.ru/strik?utm_term=which+is+the+best+echo+to+buy PDF link annotation
    • http://clebohets.xyz/118832209228igxw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_603f0b2a1f947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_6037bf7b8c042.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/cChgDje/rosaladopulijodete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488090/normal_5fda547cc275b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_602613d38bcb7.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/103463452665axag.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/ian7xji/lugilovezegim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_6021ebd74680c.pdfIn PDF document text
    • http://ndfnasg.xyz/99988779366doz4t.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/BQ2if4t/ants_with_wings_in_house_after_rain.pdfIn PDF document text
    • http://copyrightprivacy.site/jubazerudumoxijuparudajawlp55s.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/redegelesibif/vsco_full_pack_latest_version_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b825bc-d648-405c-8a74-a5004b2ae135/30759158290.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/kelobobofeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f429bca-18ba-45c8-9887-51b64ad4231c/69445140562.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/automatic_control_systems_kuo.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/muzugabemarolukol.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BF 4804 bytes
SHA-256: 8aea128c1ba08b34fe04cc124c2f1f450ec4c298ac355f725b94a5a8e817cb27
font_01_sfnt_off0001462b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462B 1700 bytes
SHA-256: 2627a98111ec5000f030f634855dead58eb057c962f3cf9c49a3e77aec2b83a2
font_02_sfnt_off00014eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAC 11604 bytes
SHA-256: 4f1f2b4feff61772bb15a927cc495b6d729e35b12b85111bdbc99a278f9b25c7
font_03_sfnt_off000175c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175C2 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f

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