Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeb3030641ee75c…

MALICIOUS

PDF

88.9 KB Created: 2021-09-15 15:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e587145903dbbfa584a29f2c3eaea7a8 SHA-1: ec09aac55b74eb30713103614023a852ac30e6af SHA-256: abeb3030641ee75c8bd8ba3ac67395e287fae1bfe007855358a62ecade256150
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting, and specifically mentions a 'Payment redirection / bank-detail change lure'. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall pattern suggests a phishing attempt to trick users into revealing financial information. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=beat+maker+3+apk PDF link annotation
    • https://billard-hauri.ch/userfiles/file/fogimefajumeninetexo.pdfIn PDF document text
    • http://zl369.net/userfiles/file/pajidadefox.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/19268514892.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/76873926542.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1613218d23d803---79682352357.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/42783764299.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/jujejerel.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/75429338812.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/wisufafetudiba.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/tudivesedawavizagifuteput.pdfIn PDF document text
    • https://ibericadearmerias.com/file/jebijimem.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/lavokazubimitabek.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/6731326721.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/64837195874.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/nefumilavo.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb939e4e68---rorajunoguz.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/bikexejikikaliganofefowin.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/24460670002.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/34267603269.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f07b2c49ed---gegigixalabifunekos.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161399bbd4afe9---wofud.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210902091009.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/zosudigixukaxe.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/74657694952.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 10200 bytes
SHA-256: a095edabb7bdbeaca03d52fc5341de32e475305860d946945dd2c77e1aa456b6
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 19148 bytes
SHA-256: 9b4eff8bde48464b236aaafa0cd54af2ec9d09f565ac2f26d3980b9161b28b6d

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