Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94688385a5a5cca…

MALICIOUS

PDF

83.5 KB Created: 2021-03-07 20:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 72167b6a75d7a609b78b49f9a2eefe44 SHA-1: 80d76a15dc49eee742b65622a18c10112ac9be51 SHA-256: a94688385a5a5cca173f31e9a0e800ee84b08ba5ff727625aaddb7433c81c317
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or malware distribution attempt. The heuristic PDF_SEO_LINK_FARM indicates the document contains a large number of external links, likely to SEO spam or phishing sites, with the primary malicious URL being https://botokaw.ru/wix?keyword=trig+angle+values+chart. The document body, though heavily obfuscated, suggests a lure related to 'Trig angle values chart'.

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://botokaw.ru/wix?keyword=trig+angle+values+chart PDF link annotation
    • http://rakadan.sportsontheweb.net/husqvarna_450_rancher_bar_length.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/3876373.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/4708301535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_6033c2655922f.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/nepavar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_600fc0c2a7196.pdfIn PDF document text
    • https://fubuzupa.weebly.com/uploads/1/3/5/3/135324320/a8fa74267f.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/jisudotumofajeloj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5ff16c4dee5c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5fc9190a52a26.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/gurafoga/seasons_worksheet_for_1st_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76639db2-8184-4be5-919a-ba3562bf4679/41119063329.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/paropunonevino.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/zelajepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066fcba7-158c-4e18-b648-e9422a221ca6/what_does_the_head_of_a_pimple_look_like_in_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/chain_chronicle_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/mekosuvekuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a65a692-5169-4424-bf59-828b87474a37/37155282203.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/7037281419.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5072 bytes
SHA-256: a0648575f4680a5c54657750219542594a65ecf7bc8963bf00853bf3543a7765
font_01_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 12688 bytes
SHA-256: 0d576633e0c5a3e247cc2a32938a1da58f520c7e4acabf568826808e97ad2b21
font_02_sfnt_off00012a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A00 16136 bytes
SHA-256: b1f920f313a8a5af4565d6624d1f8c62a5bad969a8b2a686c1dac267849db95a

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