Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16baf66823c2db9…

MALICIOUS

PDF

80.8 KB Created: 2021-08-16 14:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bcf87d6c4b93a36148d1820724f7dd6b SHA-1: 740cdfa0453c1d9da94e1d8028f1889212b49164 SHA-256: a16baf66823c2db928281d4bcd4772e880b82d2109d3d970df682bd894d67f7d
196 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as a photo editing application or a legitimate file. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the intent is to trick users into providing financial details or making fraudulent payments. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or financial scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://botosani.ro/img/uploads/file/telanezajobor.pdf In PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/wifalamofaxuru.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b3a8f62bbc---54812084111.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210812194453_666163668.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/622982080.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/42701257013.pdfIn PDF document text
    • https://postelezmasivu-plzen.cz/ckfinder/userfiles/files/nojaruvokefatejaneb.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/wonufekaraluviju.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/18990822832.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/budegexidutetiwapim.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4d28d50cac3eddc4645b39ef7d93b22/52231760785.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/97b40931912936eaf2247ff8c4de7fb4/bapasifu.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/metoxuloliwizu.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/32365319535.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210618154546.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/53624578661.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/idsrpd010frcidjsu0rjqvm8bt/81458551999.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/68551425077.pdfIn PDF document text
    • http://schokofontaenen.de/idata/vovopas.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/12217029738.pdfIn PDF document text
    • http://megalaserasia.com/upload///zerujorutiwosisodiser.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/40095528402.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7f9eb631dd8a9e1b73a4f184af7ae17a/57085093390.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/dovidexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=facebook+photo+er+apk+proPDF 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_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 10268 bytes
SHA-256: 4b00355b65beb6677cdbad4a22999b43ef458ad1935f7f44199087c5e893c5d4
font_02_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 16552 bytes
SHA-256: 22a956ce3907a815a539209e783ef0d05ba09d186d907eda58fe7db9370449c5