Malicious PDF — malware analysis report

Static analysis result for SHA-256 818ba21a20a58607…

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 01:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d43ddb6ab12477c72fa812ebf276a61b SHA-1: 5a53c9b6b4ea98e16a2c44903aad0c42676cbe8f SHA-256: 818ba21a20a5860751bb008984952cb065ade83163825d52958ced008d4fee96
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential lure hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=malik+from+house+of+payne+age+now PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366627/normal_60323b01a915b.pdfIn PDF document text
    • http://rivugijunamusi.mygamesonline.org/manual_brastemp_ative_11kg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fee50e5ad10e.pdfIn PDF document text
    • http://souve.me/niguvaxiwumoren60vem.pdfIn PDF document text
    • http://maxist.ru/where_is_the_brush_bar_reset_button_on_my_dyson1fgme.pdfIn PDF document text
    • http://avtoshtorki.shop/funny_questions_and_answers_jokes_in_tamilyc5iw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fd201305e838.pdfIn PDF document text
    • http://mikrotikwizard.com/31603794378fgozf.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://uploads.strikinglycdn.com/files/dd2a18f2-407e-4512-b309-a0ceffa665db/tawiwizinafu.pdfIn PDF document text
    • http://gaxugozoj.epizy.com/57768288679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b760be-9da6-48a8-8468-9af39bc7350f/lebogupuwoxopekimasewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439b765e-07f3-49f4-905b-71d74cc20139/mabug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c479e4a-8dbc-49b0-af67-28f826e1622d/lakixov.pdfIn PDF document text
    • http://rigirulame.epizy.com/71591772265.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/oxford_bookworms_level_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/35426096168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c635fd1-97e1-455d-9f27-f024462b76ed/plot_analysis_of_hills_like_white_elephants.pdfIn PDF document text
    • http://foraxukesog.rf.gd/tilelew.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/kogomepedixuviliwuxab.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/61778879561.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/5075288539.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/23764623443.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_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 5380 bytes
SHA-256: c352e765f60517d31ac218b87160ee20187e872b393e5f419cfee7d40ce7a7f7
font_01_sfnt_off0000f7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 11124 bytes
SHA-256: 86aaedb3bf5206de6a56a01265a779590f11728bc0cb1c95da043428729a02b2
font_02_sfnt_off00011d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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