Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa0e01577f182b7…

MALICIOUS

PDF

177.5 KB Created: 2021-06-08 21:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 42ecc746150ac8aac726598b54c97027 SHA-1: 08fb01e9a252393eb589d5eec0bfffbd5ea8696a SHA-256: daa0e01577f182b77b705147f0055d83ef258aa61070cc05c331d98aa6dd0fed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm for phishing or malware distribution. The presence of 'utm_term' parameters in some URLs further supports a campaign-driven phishing or SEO-poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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=star+wars+episode+ix+putlocker PDF link annotation
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/3fjhh96g668ffan75f118rtpej/60318657732.pdfIn PDF document text
    • http://planetamama.ru/files/file/zepilurekaboleguxefokuko.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d837d6280---77622131837.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/7e4aae12558c772f64ebadb4c55ea0f9/fiwagu.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/856a0bc451328665560143d9722c8a2b/womeferawizatefumupu.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160727591c0d35---35384531618.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/34436590978.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/mvoh5bar1vvc2ftebqnu5s1pdb/12739153882.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/5bbaj6bmb3d2p98v5s3pp8jogf/xukabedazonedap.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e413aa0a70---seredoziwakatutidako.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77e043bbc1---dilopulivumirunolusakazus.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d7b0e011e885f0e343f5cb9c36478262/zikinajegupine.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a766b37355---goxizefupadizoji.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/pk2c9qic8ob1vee6cavkrdk9qb/tibigabimotorowid.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991fba8fb40---86499279945.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/9fo16iu8diddaidoavpjrt1fqf/2482942048.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad5eb76e5---gafonezakafodoneribasidep.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3afd356f---3354496717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FED 9284 bytes
SHA-256: f08f1a208b969e0544d65d48196e7ab14c81c1a8e60205667c14351b93e5f2aa
font_01_sfnt_off00023f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F0C 5396 bytes
SHA-256: 57a2f8adb34fb08b0b0a01967ae9efb163a4aecfa19d68b2d799fdda8eadada9
font_02_sfnt_off00025147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25147 6360 bytes
SHA-256: 80a39db738c12f7fdb7c1ea77e5b2c3e501c8ada782be486ffd938f742fa1549
font_03_sfnt_off000260e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260E5 16952 bytes
SHA-256: 3938d8683b36c3fc4e068086988c4ccddbefaa10afb1cf0e6afb17e72d152448
font_04_sfnt_off00029309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29309 17076 bytes
SHA-256: b0f3ee60c09de2a6aec78fb04e4cc39262c29ab009b2213fd8277edb61dad3e7
font_05_sfnt_off0002ab61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB61 2832 bytes
SHA-256: a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044

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