Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fe518c14e98a68…

MALICIOUS

PDF

91.9 KB Created: 2021-09-09 11:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9466d1d3b1056e894787e1e0e67a99ad SHA-1: 19430e1b5ecd2db0f7a43f86704779143b30b2f3 SHA-256: c1fe518c14e98a68bbc7ae77fdea3a992b3d43da4d1b6147bee78b8c347a924f
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to disposable hosting, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm and the 'SE_CALLBACK_LURE' heuristic suggest a phishing or scam attempt designed to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://organicearthfiji.com/documents/file/vigolosegisijexutekoni.pdf In PDF document text
    • http://goldstecq.com/userfiles/file/55877383276.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/14730896616.pdfIn PDF document text
    • http://imoroz.by/upload/file/tatuluzonozebojagizenak.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/31054979828.pdfIn PDF document text
    • https://10fci.org/userfiles/file/98754994185.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/24550816628.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/77709532924.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/91299015426.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/30ac7ff5bbb68227b1fc590271c0ac8a/jezumutapafusiwegudezaro.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210908_035544.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/fafanibinigusadisajuguxol.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/91395983948.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/vimamebudesunudaxopuvubog.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/992b713c1491f4c424b56ef7521e8a57/busimiwaxubawemedek.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/cuiguagokj6ua3jami1h4ddpvs/murukuwuzuluxafotomugi.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613067e04e86b---71818661558.pdfIn PDF document text
    • http://htygroup.com/upload/files/nufop.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/ziliberemux.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/70301656987.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109021645353292.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/gekuvilolesomikupedagax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+fx+master+pro+mod+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10848 bytes
SHA-256: d3f6be6abad8c3d14b8974c08cf0eca56c2542ba0603b554e8c7f7e709a339e8
font_03_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 16152 bytes
SHA-256: 0f62411f33c11177563efe33ebd0105f37df2a55e6a92cd5aec3f2cc21bf3838
font_04_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 24056 bytes
SHA-256: 3cd6f85de12b3a9a9405b4d6f2f321703c0ff520904a4641ba4e7ebf0bac9e9a

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