Malicious PDF — malware analysis report

Static analysis result for SHA-256 663c78eaa0abcc91…

MALICIOUS

PDF

65.2 KB Created: 2020-12-16 01:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 489d65f19cedc135097c3a684d94e218 SHA-1: ab0fa309bdc962570a50d655bfe83143ab2815ea SHA-256: 663c78eaa0abcc9151557dec9ec19e10f3a829bd7c8ae43eb3dc5ab98c990299
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be intended to trick users into providing passwords for encrypted archives, a common tactic to bypass security gateways.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/wb?keyword=aambala%20songs%20ringtone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fc12e4f412e8.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/loxolu-lekudopi.pdfIn PDF document text
    • https://papekukikaduli.weebly.com/uploads/1/3/4/3/134361343/xuberolawekaru_fefisumoweluma.pdfIn PDF document text
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/7273736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f895603e19a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2ba66a5bc066edfb17265/t/5fc7f23adf14a83315458e2a/1606939194940/rope_binder_clip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e93098-0046-45c1-b4a4-dede97efe160/7575790431.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe4bde4f98375720ad7891/1606306784927/tragedy_of_the_common_man_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f58b2cf09257bd796827/t/5fc60c26fa04221c71ef5490/1606814761868/preschool_teaching_philosophy_examples.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc127ba9ee0f32b877c490c/1606494138992/samsung_s5_unlock_code_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/zefaferopujobi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc557cb3398ff75154b585a/t/5fcef916faf0bc04d1c0cdde/1607399706615/football_manager_2015_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28b2e61-f888-42c7-b775-6f299c04f021/the_hidden_power_of_prayer_and_fasti.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/matufezosegosi.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_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 5132 bytes
SHA-256: 0dc8bfa9f7eff09f486b100138d22155bef53b456bc0b355d5833761324c84d1
font_01_sfnt_off0000d580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD580 10208 bytes
SHA-256: 5c66583ff96361f9325f3a8f6b79ea59c1ff6fb193239f35d63b107eecbe9437

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