Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a595c1e8a95a7b…

MALICIOUS

PDF

68.5 KB Created: 2021-03-09 14:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b23e0b1bee426bad8b5c86bc0282c982 SHA-1: 0e09066b748164376bc7e65aaa0e88ff6287d615 SHA-256: 30a595c1e8a95a7bc6e1cfb7f771ef20d83bd783cfbc4a94bcc2ed7285e948aa
126 Risk Score

Malware Insights

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

The PDF document, identified as malicious by ClamAV and an ML classifier, contains numerous external links, many pointing to disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the primary purpose is to redirect users to potentially malicious sites. The embedded URL `https://nipisod.ru/123?utm_term=tithonia+planting+guide` is a key indicator of this redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/123?utm_term=tithonia+planting+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387040/normal_600933947fd93.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/canon_lide_220_vs_400.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/does_el_pollo_loco_use_msg_in_their_chicken.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_603071d160403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5fca410210eec.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/87071858487.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/2129297776.pdfIn PDF document text
    • http://kajipim.mypressonline.com/malaxix.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/54707806344.pdfIn PDF document text
    • http://mikurukapuviwib.22web.org/40910319760.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_export_midi_tracks_from_garageband.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fe0cce140391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufazovuko.epizy.com/56458363095.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_0f3f013fda5a4ef589a0823c5c2069a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/fakatililaxelixewi.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_c249d2f5ee9a4937bdc43175014b29f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/how_do_you_work_out_exchange_rates.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/mewepenikokaxozejagi.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/bosch_built_in_coffee_machine_manual.pdfIn PDF document text
    • http://fulariponazaget.epizy.com/oklahoma_cdl_tanker_practice_test.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_1f5ac3d76847404d825cba7973854154.pdf?index=trueIn PDF document text
    • http://momugegunimex.rf.gd/92429404900.pdfIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_f28769313c4949a798cada5b3ff33981.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/mozilla_firefox_developer_version_free.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_3dd92b36c0244bdf86c1a3e2a2cc5036.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/subudisijenoweju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B4 4896 bytes
SHA-256: 300ac8851c46ce3caf0ad53d1a3a0b56038860bd02a4f5826920b7a09ffd3ec2
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 9668 bytes
SHA-256: 3503aac41e89c41a5757e5d78e8968bcbaed7ba3915a16293e49c0f3cd74f743