Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e33125dde173b1…

MALICIOUS

PDF

89.5 KB Created: 2021-08-11 06:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 61ebefd930e8e7bd5ef6981d424cd647 SHA-1: fa59ac49ee3d58e17c558c2e09781dcc3a18d178 SHA-256: 10e33125dde173b17ea5e3ef78982e03b787fc31f1991963abc8b8b528042407
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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=gujjubhai+the+great+full+hd+movie+free+download PDF link annotation
    • http://poltinik.ru/userfiles/file/feretadidufikusefalumiv.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f517109e---jejugumokonawagivajuliva.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/rabene.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c9c77880b---budamuzu.pdfIn PDF document text
    • https://ivanamihic.com//files/84737224537.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771a030a7ac---18768338355.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/eeqijk11f3robojss3qtk8lr25/fosibebezukifafilagu.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/80275258415.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/72502468153.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fcd00ea62---14520877263.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/32161476149.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/25199657471.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/magitotupukem.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/rabun.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/3291396514.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a81d2564c---18408991764.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/begunexawiluro.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6029b2823---94822624508.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-17/20210517024454557242.pdfIn PDF document text
    • http://mopron.ru/upload/files/zifujavedokim.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/39396744715.pdfIn PDF document text
    • http://splogservice.ru/content/file/77577573164.pdfIn PDF document text
    • http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/20036270646.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d70e2bfdb---78489676082.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607532cf9f448---regewenot.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/40346021487.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608550784599e---zixanogevegudagujaramebaf.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_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001105f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105F 11192 bytes
SHA-256: 2cbf8d0df4ee15461999707d6f354f08bd6fc9bbcc0a88f83cf59368dce81a49
font_02_sfnt_off00012a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2B 17232 bytes
SHA-256: 7de3cdfcac6980e3d78d151708a756173ee6af745996a24a3e96786d1ac1e232