Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf1039e683cdf30…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 07:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0376621266951f8e31e6b1854b4ed908 SHA-1: 4ea9163172a5627fd2adedf2c2c297771e0e9bc6 SHA-256: edf1039e683cdf304d20c6ad392a6b057e45ced35b198852ae9fefcf27a90aaf
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 pointing to Weebly and CDN domains, which is characteristic of SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://xajibur.ru/award?keyword=what+does+wim.hof+eat PDF link annotation
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/kitizefugeki.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/VGhcPii/low_cut_fade_for_black_guys.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/PigFheD/12319450055.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/g2fjcOK/peziwubegisokujesa.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/2ih7MLs/popixur.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/igb9xhr/tractor_pull_sled.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/egfUvhh/war_of_the_worlds_2019_streaming.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/7816866d3702.pdfIn PDF document text
    • https://pulavirovedozas.weebly.com/uploads/1/3/2/6/132695401/bosufodoru_vunagolejolofe_sinile_sesabomujap.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/golepad-nuridi-rezug.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/PCPibFn/nail_designs_coffin_black.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/sogovekevi/xariwozipikexeremujigo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/voriraropiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/35009773021.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/26397377523.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/93716314774.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/catchphrase_game_answers_episode_4.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/medical_demographic_information_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/identity_and_access_management_questions_and_answers.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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 5156 bytes
SHA-256: cc773ddc7f40c1944e65c4cd580298f5887a91c91d2946270d72313de35fd660
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 10208 bytes
SHA-256: 86ac61b22941a2886f4430d71dc2b001e2fc09a30950c2e412719d25abdf5cbc

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