Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 b934f8eff5e9bd24…

MALICIOUS

PDF / .VIR

238.9 KB Created: 2023-10-20 16:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-05-27
MD5: 8a8f2b3c502c32f160b3964dfd114d08 SHA-1: 99e28731ad2a2c34cac5ad769c1de14b4024cc8f SHA-256: b934f8eff5e9bd2458fc59762621b323518df6eb77a5c4d1cb2bd8f84b532ed3
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://kumulemi.joopsoa.com/95233241421559528213206008?diraruforekolitagakumiwevagugaduvofifatowurizotulupefolubobojediwizuvaremanaguli=nimusebebabafazememanefuwevamelovixaxewepilisakesibomakusofimokukaposobujobevinovezogorovefulatakexujimadibadovusaxarabukifepanazibuvirimowuroxeboxupiwuzekemekaloledafasegulaxupanedodipovexagamabukajiz&keyword=diff%C3%A9rence+entre+une+voiture+automatique+et+manuelle&birodarifufovavanefojugozopezoduzaxekosodufifaxijipogigotefebureferopewolatozevazutuzikaziresi=mafodurovekovivotimepelajojokifimukumuniroluwikimavufawozaniraxenufovesufalefogufukowuwerexakoloraredifikanebawaxisidemavoxapajanurodutobusaj In PDF document text
    • https://kumulemi.joopsoa.com/95233241421559528213206008?diraruforekolitagakumiwevagugaduvofifatowurizotulupefolubobojediwizuvaremanaguli=nimusebebabafazememanefuwevamelovixaxewepilisakesibomakusofimokukaposobujobevinovezogorovefulatakexujimadibadovusaxarabukifepanazibuvirimowuroxeboxupiwuzekemekalolPDF link annotation
    • https://kumulemi.joopsoa.com/95233241421559528213206008?diraruforekolitagakumiwevagugaduvofifatowurizotulupefolubobojediwizuvaremanaguli=nimusebebabafazememanefuwevamelovixaxewepilisakesibomakusofimokukaposobujobevinovezogorovefulatakexujimadibadovusaxarabukifepanazibuvirimowuroxeboxupiwuzekemekaloledafasegulaxupanedodipovexagamabukajiz&keyword=diff%C3%A9rence+entre+une+voiture+automatique+et+manuelle&birodarifufovavanefojugozopezoduzaxekosodufifaxijipogigotefebureferopewolatozevazutuzikaziresi=PDF link annotation
    • https://jimdo-storage.global.ssl.fastly.net/file/28e76ca6-7da0-46a8-a132-33f675d98d98/rakewifejigobef.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/55d28ff0-9d0b-42b4-8190-887f90038148/downloads/kuvakoluniporoxu.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/9e5b6b40-f934-4273-a65f-cbaee9aa4b00/downloads/list_of_compound_adjectives_in_english.pdfIn PDF document text
    • https://jimdo-storage.global.ssl.fastly.net/file/e2887162-b12e-4ef7-8ae4-77e0a16b7927/xegipapunes.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64ee0ac93e334d7924c42903/652a4f8629f6f7d9d283bcb5_8723989195.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/900d123a-2557-4fa9-92f6-1446b602b979/downloads/replace_trimmer_head_echo_srm_225.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64f1a4a54d3c9690e94c1408/652a4f3c87d36e6c6646ea09_25151065875.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/eb8ff9f7-37bb-4420-bfa0-f018b38dcfa6/downloads/tuzazorimutifabum.pdfIn PDF document text
    • https://jimdo-storage.global.ssl.fastly.net/file/f8245d32-6fb7-43e3-83ec-48a599c5ffbc/wekolilunugelejuzas.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/4dbdd355-4425-45f2-ab42-b5b1d8468a74/downloads/pumikikataxamuvulobeli.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64f857a823d25137622f1cbe/652a4ea16af926707a0fd0a6_lebadagovulofidijigegumet.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64ede3edf2e95d85ddeda0b7/652a4c0dcd21e84660815580_xedawazoboku.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/7b5eeae5-e223-486e-9415-fcc3637d38fc/downloads/icom_ic-251e_for_sale.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00036fe8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00036fe8.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36FE8 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188
font_01_sfnt_off000381fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x381FC 16508 bytes
SHA-256: dfe872ed8826e44eb97d74cd0418fbbd0c1d5d5f77b2df13e13ec4f6163ae271