Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9414b016113472…

MALICIOUS

PDF

86.4 KB Created: 2021-07-19 03:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6aeb75ab77ffceffd495ef65dfefdd37 SHA-1: 2fb87efb1efe851e504401d7a0189defc892880b SHA-256: 6a9414b0161134723cee377bdeadbcbebe95cd062e5cc08b41e800fad1f7963e
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of multiple unknown URLs further supports its role as a distribution or phishing vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f004a65c553---lamasabu.pdf In PDF document text
    • http://rallyteamwalraven.nl/file/sadalemeferixedawexosusof.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/o1u2e7esnbb67p58i8alphmftd/jawovogizabijofuzatagum.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/rowowuvixobasemimuxoda.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nijt3110f5c6v3ucpbcum4ggn5/lefesolizadati.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/32422603058.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/58242157355.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/lugiriwabuzatunilebifapat.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ki0n3m785se3vlpbf9spruvrij/37519322519.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/80308145266.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/lesobitazitogib.pdfIn PDF document text
    • http://greenbrier101.com/userimages/wifanopikakilujizap.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/4215828561.pdfIn PDF document text
    • https://airbays.com/userfiles/file/tidofepafolinemez.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9ca5b266---15585283313.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/bukepinuvilofu.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/29441702341.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8a88230b---vanukatutarapisomalu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607133fc7b556---zezovafujine.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea20dda2e---xunamerusileminopurutef.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/89911828554.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/47234124953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=why+did+i+get+married+full+movie+mp4+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_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 17272 bytes
SHA-256: 32662d7be373e8a049d7e7cb668b92531975da7bef89e3be898a4d40d21f6b7c
font_01_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 11216 bytes
SHA-256: e5d323c3830bba15f4b559fe705630cea72d3484474b381f2669c9f545d5fc34
font_02_sfnt_off000133e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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