Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e0b88d9aac2dd8…

MALICIOUS

PDF

78.3 KB Created: 2021-09-16 01:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3ca054f61a9acf5bebd90f1f7d08f69a SHA-1: 46f6dc8fd4ee9fb55e3b64b702be517d3aaf2e8e SHA-256: 15e0b88d9aac2dd8aa558d1dc924be06d46ae06f71624bb4f62b2ff491f40876
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, many of which are linked to disposable hosting and employ UTM parameters for tracking, suggests a phishing or malware distribution attempt. The primary URL, 'https://infrive.ru/uplcv?utm_term=download+dream+league+soccer+2019+cheat', explicitly mentions downloading a game cheat, which is a common lure for users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=download+dream+league+soccer+2019+cheat PDF link annotation
    • https://el-tall.pl/pics/file/94994803955.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/faxinazeze.pdfIn PDF document text
    • http://chpcentre.com/files/file/dudobeti.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/ravoxuruzugan.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cd0b08c27---44262366987.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/megudekowe.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/58182479148.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/89458426935.pdfIn PDF document text
    • http://signauction.net/userfiles/file/remajow.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/66335530431.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/49472856175.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/08/fizebapesokonon.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/80613924131.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613c70ba1995a---44431458341.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/wesevazarupulaxunelo.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/vaxafisokugose.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/5674093881.pdfIn PDF document text
    • https://cooperspick.com/files/muwunijopalixukozenu.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/33590970205.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/tojegipepu.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ha2upiltqi752v8fqvc3b6dp6d/68541214295.pdfIn PDF document text
    • http://oilspecchem.com/files/ruzeru.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_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 17468 bytes
SHA-256: e8b88c40afc2cbce932f788bf18fcf05c39f77d0e8f010c84d2d6f2fe7d127eb
font_02_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 11376 bytes
SHA-256: 29dddee0143a1e5ea923a2c547a00712af7e6e615a22f989fa1742eee49c60cf