Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe50f33e21b0f5e…

MALICIOUS

PDF

74.0 KB Created: 2021-01-23 06:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3b75a1dafbe415d3591e90fd4156f815 SHA-1: cc72440e12023770b9a68f06e788389a7c7e65a0 SHA-256: abe50f33e21b0f5e68335e2c342d5bb78491e1305f593c5a80fd92a907dc4cff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly benign documents but are likely part of a link farm to obscure malicious activity. The primary malicious URL identified is 'https://baarspo.ru/aws?utm_term=kranji+war+memorial+guided+tour', which is presented as a guided tour to lure users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://baarspo.ru/aws?utm_term=kranji+war+memorial+guided+tour PDF link annotation
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/8c2c942da4d15.pdfIn PDF document text
    • https://bifepafu.weebly.com/uploads/1/3/5/3/135315465/7583591.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/Le6pLje/tomtom_speed_camera_app_for_android.pdfIn PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/favozasafej.pdfIn PDF document text
    • https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/nedasuma.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/date_sheet_ignou_mcom_dec_2018.pdfIn PDF document text
    • http://letekidela.iblogger.org/jopafotedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lakadutof/air_force_question_paper_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/6871952922.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/portuguese_to_english_translation_app_free.pdfIn PDF document text
    • http://wosamufudov.epizy.com/pangu_frp_bypass_tool_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/osfi_icaap_submission_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/angular_free_template_material.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/76829158011.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/dixusuliditadubo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD957 4984 bytes
SHA-256: 82128efba9cef9daefd99f75bf94143190a8de734cfd9d0267493276cbe324c5
font_01_sfnt_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 10164 bytes
SHA-256: ff04f304fde3abcbbaf0382fccba40a890b62d3829e95993a73131b0d76f7df0
font_02_sfnt_off00010cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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