Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b793bc77135d3ac…

MALICIOUS

PDF

102.5 KB Created: 2021-03-29 22:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 01b17c7e28e009671528e781ae491de2 SHA-1: bd7b3dcaf5d61246d216be1fdfdd2d61f21705ed SHA-256: 4b793bc77135d3ac390f3df97ce322f9cc54d11e4ace3ad536d6bbe9c8f25c07
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate an attempt to direct users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://bologen.ru/award?keyword=authority+bias+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480598/normal_600c197ac8f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_6030a732e64da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_602e534e963b3.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/9a8409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447915/normal_5fe46417d4cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_601df8043ed82.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/befasej-marupekoxofefi-xuwufuri-tamutame.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/1530980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_5ff262a179a29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495526/normal_5fe4fd10daebb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481173/normal_5fce76174df40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6042ebb0c2cbd.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/xalexojaxipud/abbyy_finereader_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/building_construction_and_maintenance_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/37554507235.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/xawumogodatijokanewaboxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/bfuhs_mbbs_date_sheet.pdfIn PDF document text
    • http://rilefup.epizy.com/graphics_design_bangla_ebook_free.pdfIn PDF document text
    • http://pafemovokixap.rf.gd/tch_trang_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/ridopesunapikoliloxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/algebra_de_baldor_10_casos_de_factoreo.pdfIn PDF document text
    • http://kevixavi.rf.gd/john_deere_l120_steering_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/dupirixutukujifiba.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/senemuxolesexotoliwolu.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_off0001487f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487F 4988 bytes
SHA-256: 4dd8a1782d8c4c3be0e8b093e9584d0714b0957f7fcc88369eeb9147ceddecb3
font_01_sfnt_off00015984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15984 11024 bytes
SHA-256: 2b8c35219a53f9a7cd61ea7bf95f76710742b96333d842182c0bc553408b28b3
font_02_sfnt_off00017e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E82 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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