Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bedd8dce4370225…

MALICIOUS

PDF

75.5 KB Created: 2021-06-14 03:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b5b1977170c41dae814419a5c42faac SHA-1: 1e15dc926204a392de03495e51673123706a4e95 SHA-256: 0bedd8dce437022566a61f65c3143e921341da3cadeea2403f418fbe02eb19b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/pbw?utm_term=free+printable+for+2+year+olds PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494431/normal_5fee7f72150d2.pdfIn PDF document text
    • https://loligilifalo.weebly.com/uploads/1/3/0/7/130775627/gawuwola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_603009406fb4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_602f416ac8080.pdfIn PDF document text
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/kulodevagosofupojefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_601afce0b5046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5ff68d18e6a9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fceb90b1c5f8.pdfIn PDF document text
    • https://jexumaravoza.weebly.com/uploads/1/3/4/2/134265375/0a0acb5732eef4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408476/normal_5ff31bab3efd9.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/1490247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_60628488c1a77.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4482623/normal_60b006034c700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_603c165b51376.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/seditero_rosafa_lazowogol_bunezoxamapemal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144839694/saving_your_second_marriage_before_it_starts.pdfIn PDF document text
    • http://rupuker.pbworks.com/w/file/fetch/145261749/gif_editor_apk.pdfIn PDF document text
    • http://nibokuwogi.pbworks.com/f/desiring_god_bible_study_plan.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/vunagamituvipalusakobojox.pdfIn PDF document text
    • http://doxawadar.pbworks.com/w/file/fetch/145218867/ponmanai_thedi_lyrics.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144587835/paper_flower_pattern_cricut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ebc6df-b96f-4bf7-b22a-7ee3ec7e2ca3/tork_pool_timer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede8de04-8f43-4224-97eb-29a7635f3768/15889368512.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/f/7.2_extinction_and_biodiversity_loss_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5472e026-aa78-404e-a1c4-f9d6b60db3b1/vasuvawurepidato.pdfIn PDF document text
    • http://xemademeku.pbworks.com/w/file/fetch/144692172/how_to_take_learners_permit_test_online_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b576e485-8d98-47c1-9b30-963a8c0db3cf/nutodamesabuju.pdfIn PDF document text
    • http://gebetedoke.pbworks.com/w/file/fetch/145218597/live_football_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6600fdec-00aa-482b-bb06-369d20a57854/89540244516.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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5364 bytes
SHA-256: fc130a3a5365466e5434a3c3d296c0e1126a774220609cc0b186e81b91aa2cf3
font_01_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 10176 bytes
SHA-256: be00a3f3eb270be85af79905b648b978630bbc182f966404eee2402835362a25