Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef7f5090d7a266c…

MALICIOUS

PDF

75.5 KB Created: 2021-07-06 11:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 49f69123b02d50d344c135731e29d348 SHA-1: c0aca02157a140019712886bf441490be39666cb SHA-256: 5ef7f5090d7a266c5bbb7b737db23f0b37ecffb6e0b56a2ea6b5a9495542f74e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URIs that point to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised or disposable hosting suggests a tactic to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ehomeforeclosure.org/images/file/92464068800.pdf In PDF document text
    • http://jcon-aps.dk/userfiles/file/wagimawavesepagupuwemoxu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a764f412bf2---72387856178.pdfPDF link annotation
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aefc39a1a03---viluwozofukej.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce46d0e3b---wazubigejotasaxule.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e023c764814f166f7fceaf2dd773235e/16297669531.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608181d653d11---38425712595.pdfIn PDF document text
    • http://everettsbarbque.com/clients/b/b0/b0b566c85bab127526a414587b81487f/File/74947696327.pdfIn PDF document text
    • http://gyobel.itpublic/file/linavimuwigaxigepe.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f89afbdd---fepir.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e022bd7aa87---9904878335.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/51785846165.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/99851751418.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021052514335489.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3d605ed71---lilizugiwanutomawejemeluv.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5545326c0---93275548856.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0768e531---15948511886.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085905dba235---padidusomibubonajof.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607864db32a7e---60197169934.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/67463966153.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e59497ba5e---falodemetuxorefofu.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0f90435b---37453030675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=convert+pdf+file+to+excel+for+freePDF 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_off0000c6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D8 10484 bytes
SHA-256: c118f3ae10710d653782f17d4a49bd445dc5da4ad4efd18cbcdb75a1c3809192
font_01_sfnt_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 16364 bytes
SHA-256: 29341c33a37b23e0b6f7262c90c1994b98b73b16d27f3f0a69b5e222008d648e

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