Malicious PDF — malware analysis report

Static analysis result for SHA-256 d922ad9df2cec3cb…

MALICIOUS

PDF

78.4 KB Created: 2021-09-28 06:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 376b57a9fe578c10d0ca29cc079be51d SHA-1: d79d07fd67ecf2ee6c411741ab1d1e95c01ba5d4 SHA-256: d922ad9df2cec3cbecdcdccd05f319803045756ef024ed3e0bfff5983c1d8a09
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while some are benign, are part of a larger pattern of redirection to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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 http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1dfb7be0b---metuxiwofimudiragi.pdf In PDF document text
    • http://nhactheducthammy.com/upload/files/mevubikelifiketivasa.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109111335216488.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/80125616343.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/nebuzikanudomumiji.pdfIn PDF document text
    • https://hinaweb.com/upload/file/51752231204.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/24573623657.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/0bb5052d4aaa68e9edfa01f54d8bd6a0/pivonigijilefetekexerila.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/folen.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cba23ca920---gafisutileviwumewifadu.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/fetav.pdfIn PDF document text
    • https://olterus.com/contents/files/jedulesuwiwujidexa.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/duxekujufumopexosapevigiv.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/47372371398.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/64374203911.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/66920653209.pdfIn PDF document text
    • https://questyme.com/userfiles/file/xekeworisukot.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/29267901280.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613484275e830---migiloforuware.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/3905155794.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/lapebifude.pdfIn PDF document text
    • https://angkagenap.com/contents/files/fizufo.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/19612376370.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/rawir.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/49635132737.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/97132953623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mobile+passport+app+for+androidPDF link annotation
    • 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_off0000c6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6ED 10624 bytes
SHA-256: 36ca8b43dab6729d4f1607574465f036b32d5c06b130179169057eed02e204f9
font_01_sfnt_off0000df20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 20372 bytes
SHA-256: d64d439fafe90d113b7954878f2b972c347dbe1fffea5bc3ba57a60243d25ab4

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