Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e3ad1511da3558…

MALICIOUS

PDF

91.5 KB Created: 2021-09-20 04:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0169c0c6c4a74a259e8578a49a0ca62c SHA-1: b63a35810ed0669ee30af612e401f400cfe50832 SHA-256: 72e3ad1511da35583dbfa46f2d31312845fa14a20a322a07d92d868eedd3a363
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which appear to be part of a link farm hosted on potentially compromised or disposable domains. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://wish-pharma.com/upload/files/48744023183.pdf In PDF document text
    • http://dyccpharma.com/upload/files/sozoxoja.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/dametaji.pdfIn PDF document text
    • https://ckmandarin.com/uploads/jaduzu.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/57834323095.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/girelizubikufabenox.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/12362428592.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/87924580544.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/75859872427.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb7f3a3db1---28654583764.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/98552654305.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/2109011316589884242yikm.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/52668083224.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/58652545245.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/njlbomqo7tcf9f8hitg4jbsdqk/vosudobozapivanu.pdfIn PDF document text
    • http://teresachild.com/upload/files/gazededalunojeleza.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/39864174243.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/58074320896.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/27680339330.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614199d4981a0---jimupuxudevoluserunu.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/50948233936.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/pozexij.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/zeliw.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/95746630056.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/sivevowimuxizunilajid.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/57816800215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=top+notch+3+pdf+free+downloadPDF 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_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 18064 bytes
SHA-256: 323a3c5f7798c20e5c7707468e119485178d9f9b8b6be0b208ae82167ee93d40
font_01_sfnt_off00012f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4C 10676 bytes
SHA-256: 8e6540a6dcfb7bde23c9e596e06a1a4e34f4955efe8a81dfbc16f7c25dd1ab77
font_02_sfnt_off000147d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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