Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd647377460b6d3d…

MALICIOUS

PDF

96.7 KB Created: 2021-03-15 11:30:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c9f36d440eb47234a01931302c4eddb4 SHA-1: 9a736fc4943fa57224d7cd578c644bec1f52dce1 SHA-256: cd647377460b6d3dd45f1a42bcf3094c79cf42d7a08f1e9219e3fa159b9218c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=examining+the+earth+system+chapter+16+answers PDF link annotation
    • http://italy50wow.pro/project_coordinator_interview_questions_answersxqkup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_60465b4ad6986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fe04b4719527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_5fd0d8746e226.pdfIn PDF document text
    • http://mixit.info/how_to_use_wilton_tip_210d8th.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/Re3ghFd/63310465681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_603063b916b05.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/gjdnIia/pavovogibobagovipoz.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/gglgmgc/13242656021.pdfIn PDF document text
    • http://fruittea.space/dolozuzuwup1ak6q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3228dc58-b2c1-4aed-ac20-03fc52793822.filesusr.com/ugd/43afbb_ec07e0994b5d4fc08db217cca9abf5e7.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_b594a96db98c46c69a84350c9ce22ee5.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_8c4d9af826e14c9b9ef6dec99342d914.pdf?index=trueIn PDF document text
    • http://masupes.rf.gd/42448665092.pdfIn PDF document text
    • http://nasukenapab.epizy.com/fluke_networks_microscanner_2_termination__test_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/22299952371.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_d4c25a63647d441e82af73923a24ae9c.pdf?index=trueIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_0bbc61c336744e17bab8f996307429ff.pdf?index=trueIn PDF document text
    • http://pedabosotepebek.epizy.com/clinical_biochemistry_tests.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/glaze_business_plan.pdfIn PDF document text
    • http://jumuvurerurulap.rf.gd/huffy_kid_bike_reviews.pdfIn PDF document text
    • http://xakafoboveje.rf.gd/40428018659.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/at_the_airport_vocabulary_activities.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 5420 bytes
SHA-256: 1773079a7ef78b9c7b6892e4a8c720f49cbe4acf76901be3c686dec5c10fc3ef
font_01_sfnt_off000141b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B4 10728 bytes
SHA-256: 8de88e6baa2237b58bb652003a695f3a2b0b0475f8238b49ce9589c852b5d74b
font_02_sfnt_off00016684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16684 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230