Malicious PDF — malware analysis report

Static analysis result for SHA-256 662d37622ec41c58…

MALICIOUS

PDF

81.5 KB Created: 2021-02-20 05:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 03dbd5e5f21f6f259ac82a6fef8751dc SHA-1: ddbf305058ede2725e808e51947b395d7debf53d SHA-256: 662d37622ec41c585dfc4f2361e10057e6ff048a424ad27284a1cff549f3fc75
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=chevrolet+p30+step+van+specs PDF link annotation
    • http://myirn.icu/colored_rolling_papersz61dx.pdfIn PDF document text
    • http://mandarin-fruit.space/6._4_laminated_glass_data_sheet98o6a.pdfIn PDF document text
    • http://lebadatow.22web.org/jar_of_hearts_glee_sheet_music.pdfIn PDF document text
    • http://my-favshopf.online/wisuxitunulevenorozak1fb.pdfIn PDF document text
    • https://witokilufixag.weebly.com/uploads/1/3/4/7/134739393/nevegopiw-sulagosusebito.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/dukajevo/59949518716.pdfIn PDF document text
    • http://fijesuluxugej.rf.gd/gororowi.pdfIn PDF document text
    • http://xerevim.epizy.com/28646508125.pdfIn PDF document text
    • http://nasarijexu.epizy.com/54948260180.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/affairs_cloud_current_affairs_monthly.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/amazon_video_size.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/dalovukudilew.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/jsw_roofing_sheet_dealers_in_kolkata.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/jesiligulazuxukoter.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/38708809839.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/73417287292.pdfIn PDF document text
    • http://namutogenasokab.epizy.com/cara_kerja_analgesik.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/sizinu.pdfIn PDF document text
    • http://bavuveba.epizy.com/avid_nexis_quick_start_guide.pdfIn PDF document text
    • http://xuwunokebisul.rf.gd/bulava_teri_yaariyan_song.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_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 5292 bytes
SHA-256: e797496876989120156246361f76d6b14c2516c50162b63db2223682b181519c
font_01_sfnt_off00011361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11361 10896 bytes
SHA-256: 3cdb871dc3a508a5f4506e0d305606bec9039b8d78c26c3537dcf0915c1cd8a6

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