Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1328acb93f4cb5…

MALICIOUS

PDF

91.1 KB Created: 2021-08-14 16:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 01c4e569e362110224ee0e926fe73c55 SHA-1: 26335c4e84fa2c2a3d454364fe85d07de4e629a2 SHA-256: 2e1328acb93f4cb5244d0b159265d9f72aac6ed963e455666c07b040d2ee8d61
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document also contains an instruction to disable security software, indicating an attempt to bypass defenses. The presence of embedded URLs and the overall structure suggest it is designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://krisoc.ru/uplcv?utm_term=jurassic+park+operation+genesis+download+pc+completo PDF link annotation
    • https://hansenlight.com/UploadFile/files/56094886891.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/4940536137.pdfIn PDF document text
    • http://stattus.com/assets/file/90422668331.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609633c176650---4585712956.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/25501960883.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/tamulipamewuxokizuwip.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770ee845d5d---75035845899.pdfIn PDF document text
    • https://ntc-container.com/upload/files/mosonex.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/51d517f71959bc24294bab26887046f9/firorin.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/43783216580.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/64535721655.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/25666945631.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd2b20dcf---gorizudesorujelut.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/wadunipajomerigozesomade.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1a581c5b4---dezikomabifagekobozeki.pdfPDF link annotation
    • https://sts-cct.com/app/webroot/userfiles/files/sutowodazifuvojil.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/ee614d42384bdb0e966491667a670c3b/93783463461.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b7d18497d593a45ec99e8342c4f49acc/78466309678.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a644bd808ee---kilenuwu.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/18385404595.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/gutafatumifutobuv.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/wopugi.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160afd784ae7e0---makosogugilewegu.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/43213688453.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/61590731477.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_off0000fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 11128 bytes
SHA-256: c6024884b00256c1e803569940b16122937302288fea71b8f4a8843f95f20ae9
font_01_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 18964 bytes
SHA-256: 88f71310c38ef2ad93632f667ddcd9c5a04d3c8a7aeac50a04c51fa1c44f653b
font_02_sfnt_off000145de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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