Malicious PDF — malware analysis report

Static analysis result for SHA-256 f537468cd6f2043e…

MALICIOUS

PDF

78.5 KB Created: 2021-05-12 13:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7878392b01e969b586761e01d891a7af SHA-1: 46c3cc43d5816c4f7786a4c0fd1e70cb7cc9c4ea SHA-256: f537468cd6f2043e47006d57ee38ee5d2347dcb53bd6cc7a8388a47e63b272ca
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document's content, though obfuscated, appears to be a lure related to "Piano adventures level 4 theory answers", directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=piano+adventures+level+4+theory+answers PDF link annotation
    • https://cdn.sqhk.co/zevolazezag/VHksz3s/xatavadokulut.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/dipobekobajurejapu.pdfIn PDF document text
    • https://buzalunila.weebly.com/uploads/1/3/1/6/131606025/naxetabapudanu-xoxoki.pdfIn PDF document text
    • https://cdn.sqhk.co/mikakiraw/ZWjahci/motelowexe.pdfIn PDF document text
    • https://xumomeroruv.weebly.com/uploads/1/3/4/2/134266579/rerub.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/5831766.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/3560891.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/7506860.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/dovudog_metanudeme_xabararavab_siderivesogov.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/Khcjicx/83365479868.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/9T3H8Di/tinukevopalug.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/bulozor/15600009927.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/what_can_make_a_contract_null_and_void.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/1745985182.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/parasite_eve_wiki_guide.pdfIn PDF document text
    • http://tizabapokumi.rf.gd/advanced_periodic_trends_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/bungee_font_family_free.pdfIn PDF document text
    • http://xonutese.epizy.com/7201320426.pdfIn PDF document text
    • http://tivekanudoz.rf.gd/mehandipur_balaji_aarti_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/91953202687.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/pazotitogowu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/descargar_dead_or_alive_xtreme_3_android.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_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 5256 bytes
SHA-256: cafc32ea11f4fa5d735001e55ec57f7dec723b4cf1d22b15cc775182198b0b52
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 11980 bytes
SHA-256: af2797c904635deccef704b11310ac213602b6b32f582937f690bca8cf8cf8a9

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