Malicious PDF — malware analysis report

Static analysis result for SHA-256 481fe3da5b3409eb…

MALICIOUS

PDF

78.5 KB Created: 2021-03-06 17:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8171b76502e5d166a330cd36e9ebb897 SHA-1: f95bbfb9f0f36e4340c2a3c14e095e44b87e178e SHA-256: 481fe3da5b3409ebb6b32d8283d5fea2a0c4828793c6570e2d4f658f718743ad
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing and SEO spam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and one of the primary URLs points to a domain associated with malicious activity. Although no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=emerson+thermostat+manual+1f80-0261 PDF link annotation
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/6d79b4b7a32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fca8f3fe0b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381546/normal_5fcc20c22a98f.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/dakajipu_ludekaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417222/normal_5ff91d9f28950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_603e09098923e.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/nubezela.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/67915337874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5fefc7c100c52.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/8824348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11d3fc9a89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5ffd22cdc58ec.pdfIn PDF document text
    • http://zofugef.mypressonline.com/knights_of_columbus_4th_degree_regalia_change.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/what_is_my_leadership_philosophy_test.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/fdc87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389361/normal_5fdca68cd2c6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5fe07c9a18ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_603fdbbf28f3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5fc74510223e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_60017afa15b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_602a6b7257832.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/mamukawaxatali/transformers_bumblebee_car_model.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/modern_business_plan_powerpoint_template.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_off0000e612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE612 5504 bytes
SHA-256: 36820c03391a32a4b097861fdf504f6cfb6c34eaad8cd59697575c1ce0fced74
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 10472 bytes
SHA-256: c87642f6c0616c72db6707943460648bc9109e527fd08dbd7656819ef8352b75
font_02_sfnt_off00011c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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