Malicious PDF — malware analysis report

Static analysis result for SHA-256 af544ef99072d0f1…

MALICIOUS

PDF

84.0 KB Created: 2021-09-11 11:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dd781f5b6344a249140a691d27309a48 SHA-1: ca449fa281c0158d80e9b3ead8a0729e83cf0cd7 SHA-256: af544ef99072d0f17dda9cc23d84cbf9a2572a9f12c183dd884391eaadad099e
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to obscure the ultimate destination. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing they are interacting with legitimate financial instructions, a common tactic in business email compromise scams. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://coastalholidayproperty.com/ckfinder/userfiles/files/16563696250.pdf In PDF document text
    • https://r4binsh4h9-att.com/contents/files/89922373287.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/lazuxamodipotaxinozidixe.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090406331930.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/wotopudewixajejupononik.pdfIn PDF document text
    • https://nexapos.com/upload/files/49767901817.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/6520876562.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f17a387f80---74195790793.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/10265179363.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e3b2e0d016f0c909936295a739e8a4e7/49998158200.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/mogafajodokukemujanisori.pdfIn PDF document text
    • http://aquatherm-graz.at/files/98342491470.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/54bab635c8ddaa2a3989499ebd2a4440/tagiwuni.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/19292484969.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/wubadakirufe.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/sirabeveka.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/suposo.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/kudomiradopunuwo.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/10040996517.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/kamebabefolopegudox.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab6fd68a87---23089450722.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613502ff8ba9e---pobelilizadujexi.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/zivodokewuwirosodosuwisuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=restore+whatsapp+backup+android+to+iphonePDF 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_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 11028 bytes
SHA-256: 3757a5e965c55bd998420cbbd1886c3bdd15e26cd288172927497a2ddb627cc3
font_01_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11168 18768 bytes
SHA-256: d79041f7eae99470df1067c998b5846f515b122402868fd55792f84c8f82a937

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