Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e456459fbcb456…

MALICIOUS

PDF

80.6 KB Created: 2021-09-02 10:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d86570c0c9bdbc32d6326bbb37fafe98 SHA-1: 8cb6e979500beff1f4d0f2d45867dcfec20bfc05 SHA-256: 44e456459fbcb456b2c4fa966acacd769879939cc43a372948e4e0cdf7ce9130
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=tipster+sure+free PDF link annotation
    • http://servicedental.it/userfiles/files/5409486527.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/vomibod.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f61125eb7d---bavekidubilunarovaxunimo.pdfIn PDF document text
    • http://cartopack.com/Images/file/75958019823.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/62100226656.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/1dee228dc28f89102d75a474f30b0a3a/dexafa.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/mibudi.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094b43c80c3e---pugus.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/53511685416.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/8c4898c88bcc8392cde243797d9a1c61/wulesowuzasederurogulebu.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210815165849929938931.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/fipokarerig.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f84c3877103---34095836713.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/uvkllf7lupl8h8plbafga6p1n2/posipinuzibonirojejekav.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/59415509361.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/93880148719.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081d91638d95---povutunoragudinape.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/2kabnbh2ocmrltduufbsp77j18/49770691954.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/88896384791.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d02c3fcdbce---wawinujigig.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/81313396917.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0dc32d53cf65c6b6d3ea238e432953ec/tevajerikowi.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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 9980 bytes
SHA-256: 5051ef684c2abb8f61969a91dd87e7be7df874e1834badb97c8b36bda493ec00
font_01_sfnt_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 16912 bytes
SHA-256: abe62f3b50c8a5b252384a0765eac3c7dcfcb58d15337c886f950382943f8e21
font_02_sfnt_off00011ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.