Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01fe5241b33844b…

MALICIOUS

PDF

86.5 KB Created: 2021-08-20 06:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0ae5aeada709b962e762a05acf2aacf SHA-1: d2161c9a176738c01c96a42985f16d6849c62639 SHA-256: f01fe5241b33844b0546b013e0733a99f54cabbe9e4e67eec539aaaa23c3964b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic confirm the nature of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://ansonseatery.com/uploads/files/vanovegak.pdf In PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/jobaxejowupokepefitizudu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sorobot.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/8e90cdd64922751ec9678cb52f48c485/kemirazibi.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210803161202.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/58140238062.pdfIn PDF document text
    • http://happy-land.hu/editor_up/68283175012.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/12829375591.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081576f943de---solajebuxosikevila.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/40372011938.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f69ea30cf9d4f61411a3a2bbc8a2e816/gigux.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/gexalosokogefugit.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/vuzemifeluganutizip.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fa38bb7d3---63551490637.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16073bf12d7395---55201602038.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/zevusonezupanuwajo.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210616115236_858tvu.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/43733802854.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d2c0cf41---26890579093.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/soviwepunuxiwi.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/vdg9jbi2qcirpk3pbkbfuqebtp/36646182117.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/ditubokeroxedarujixob.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/wabugivepisuta.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916c8485c17---2168978084.pdfIn PDF document text
    • http://riceart.ir/basefile/files/xunufidusudotitoser.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/b01b20ba5dd55d5282f5d0c7a438dbab/zurozexozatafajokuxetam.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/pabezirerozamubuxipodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+draw+a+rose+step+by+step+with+pencil+easyPDF 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_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 18576 bytes
SHA-256: 0a7f8677ce00b8faad0f02e0a07b0d35ef4483df523af227c15d826eae6a3454
font_01_sfnt_off000117e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13000 10940 bytes
SHA-256: a6a38dcbeb7da90267293588e0cf95147116a615b9b8c45b328b151feffb6733

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