Malicious PDF — malware analysis report

Static analysis result for SHA-256 0430892e7858487b…

MALICIOUS

PDF

76.4 KB Created: 2021-02-18 18:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e870a82ed18cf7c05908971f870f7c8 SHA-1: ce78e8ada8f828dffd27a446779e70fea3f8da72 SHA-256: 0430892e7858487bdba4a20851b213495b2ff3372e5c5ea6e8d619cc74e0acc1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on Weebly, suggesting a link farm or phishing campaign. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a large number of links. The embedded URL and the document body text, though heavily obfuscated, point towards a lure related to astronomical information to entice users to click on these malicious links.

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 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.
  • 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://seumenha.ru/wb?keyword=what%20star%20is%20visible%20tonight%20by%20the%20moon PDF link annotation
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/lebunuro.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/wezenamako_kevitevipone.pdfIn PDF document text
    • https://toxinezewam.weebly.com/uploads/1/3/1/4/131452950/6914730.pdfIn PDF document text
    • https://tibufidis.weebly.com/uploads/1/3/0/7/130740046/xufulezoda.pdfIn PDF document text
    • https://rejafolurolege.weebly.com/uploads/1/3/0/7/130740622/zepaluzuj.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/vujirakufaro-worufixu-zasem.pdfIn PDF document text
    • https://bagamijak.weebly.com/uploads/1/3/1/3/131380043/wogixinur.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/vebuxidoje_vokat_nuwubetiji.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/61f6838d6ad7ca.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/8186c7457de2ab.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/zumomasugipeno/73821864237.pdfIn PDF document text
    • http://kitakel.epizy.com/nederazomobimelusamig.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/how_to_install_canon_printer_without_cd_on_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/japumuxopev.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/format_factory_samsung_note_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/40884549282.pdfIn PDF document text
    • http://babematalal.epizy.com/pumijuwarow.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_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 5416 bytes
SHA-256: 9a38ccbf75672adfae10531ce5c1d11ed68fc0d1f48c99e55760abf306c73ae6
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 10240 bytes
SHA-256: d50cc624359ef8199ade14e079aeba9d7b64c2aa367bc288719e0c293982a1bd

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