Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffbeb4707072139…

MALICIOUS

PDF

98.2 KB Created: 2021-09-06 01:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c931b660869aea29481bb4ad3ce929ef SHA-1: e311e9bb6486d1b8eb3024015f6bf3a2717fc944 SHA-256: 0ffbeb4707072139eab0e34b8e97deeb1995b551e835dc1a1f625526291c3003
164 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of external URLs. Several heuristics indicate that these links point to compromised CMS uploads and are part of a link farm hosted on disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to direct users to malicious websites or prompt downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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://garglob.ru/uplcv?utm_term=whale+v+mk6+manual+galley+pump PDF link annotation
    • http://duda-tech.pl/dudatech/upload/file/68239377364.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/58052776706.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/56400108863.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af525f2974c---mujusesavig.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/rokasulitonopadavekusisef.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be3ad12500---97399626826.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/2420708247.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608395f13ccf3---19375066934.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119c437cdc99---wenevegigogabizos.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/bafera.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f361d389fc---xujulog.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210824002756_szbrlv.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/xaxewawafugapof.pdfIn PDF document text
    • https://cecprint.com/images/file/nopegotevifejulade.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/30690814060.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/j5endipeku35ru4gsuftdnhcl0/93996507609.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bm3ftjcl19fvgupag58o7ono7h/lotuxifefasewugedeloxim.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/tizapenuvafip.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b09a7f40b1b5320ae5a6090f5d73b563/26335225205.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/8dfb668a870277569a4aa5f463c45969/sevodavalitatepozonukafa.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e6c8d0219b1a743d682c61ae53e93efd/99653532795.pdfIn PDF document text
    • http://starlightcelebrates.com/clients/4/43/43e9139217482d7666ce300faf566241/File/vezofonomawuvunazugijeliw.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac5d03241---61047737093.pdfIn PDF document text
    • https://retta-bg.com/userfiles/34492006578.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/c2c9a7d5ee196322ee095f001226addc/nulurokotesoxi.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_off000119ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AC 18836 bytes
SHA-256: 15b64431174fcd472b4b5839da118e73ac64b689fc5787d80b2414aa2881782f
font_01_sfnt_off00014ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000162d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D8 10656 bytes
SHA-256: f1fed779453c0173f174c85f12014a1c101e8850747d908eb5efa1fd48bace88