Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca02018ad912df5…

MALICIOUS

PDF

74.9 KB Created: 2021-09-01 17:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f6fd6aba47fbba955b7b98c3181658de SHA-1: 837d94b49a49511820815971cbe5863c01d39c03 SHA-256: 1ca02018ad912df51c19a4e2332470c882e71b99550b93a16996d7701a19d14a
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'link farm' heuristic further supports this, indicating the PDF's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://ketchas.ru/uplcv?utm_term=where+and+clause+in+sql PDF link annotation
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/jibat.pdfIn PDF document text
    • http://dentherapia.hu/files/file/buvaxopifama.pdfIn PDF document text
    • https://maisonforville.be/documents/file/79748843804.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/39879655928.pdfIn PDF document text
    • http://tillyardci.com/userfiles/file/xexowubilumufitigiteguj.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/xotewovunibuvakukopudigog.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea3f2380b---503681254.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/61241554923.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b4prqi2o0n7ef0d5upsuiu3891/43437957977.pdfIn PDF document text
    • http://e-hematologica.com/users//file/31280898189.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/54331280476.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202108310446121231.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096faa5cf450---37558761403.pdfIn PDF document text
    • http://alptw.com/images/files/21036166765.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/rodugezigafudoponupekor.pdfIn PDF document text
    • http://deltools.com/userfiles/file/tozefejet.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/75466729153.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fodarinularegipuj.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/sasominazipakumarogofizew.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2240efa53ec8d34a698fd630c204a40b/95721451110.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ek4cjvdh12ht9442o11nu3kdkn/kigaxi.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/40722526935.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/sijasobipu.pdfIn PDF document text
    • http://aweibel.com/Photo/file/debokuvolesur.pdfIn PDF document text
    • 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_off0000c202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 16952 bytes
SHA-256: 574153c12985d34dbcf7ff1b92dde71f31618ad54570d7136613353755d21fb3
font_02_sfnt_off000105f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F4 10488 bytes
SHA-256: 108ea5e4303e3023d2ad875030b2a01b8437541931bd834f7424cc2cc72b0074

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