Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d5cebabc6ecb8d…

MALICIOUS

PDF

75.2 KB Created: 2021-05-11 05:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7d562e648e6efcc6029f3fa29bf0f0a1 SHA-1: 514fc0e52a3203ef25868aec81ecad84273a9071 SHA-256: f3d5cebabc6ecb8dd599b26725ff34672316d457ce3974de40dd968022afdc2d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://bologen.ru/strik?utm_term=how+to+use+scantron+sheets PDF link annotation
    • http://zatakifi.22web.org/65640795874.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/sagevazemukaj.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/do_pizza_hut_employees_get_a_discount.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_602bdb6db2db7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff400ad2cbbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_60657700a1841.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/adeste_fideles_partitura_coral.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/42277024128.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/personajes_principales_de_la_obra_aves_sin_nido.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/haier_mini_fridge_not_getting_cold.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403117/normal_5fc847d3550d9.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/60884194912.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/75704258141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jalovunenenema.epizy.com/bootstrap_4_center_form_horizontal.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.pdfIn PDF document text
    • http://legatuwaw.epizy.com/fuvifosafik.pdfIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_1ed5fe64d8fb4fe8b13886ec8e352815.pdf?index=trueIn PDF document text
    • http://fanuzisi.epizy.com/changeling_lost_2nd_edition.pdfIn PDF document text
    • http://xoxudexutuku.rf.gd/nodinikozirepezafop.pdfIn PDF document text
    • http://dijovomivuz.rf.gd/accelerometer_android_kotlin.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_0d7f28d368344cd78479a29cb954a40b.pdf?index=trueIn PDF document text
    • http://bexiponezewan.rf.gd/mapa_geologico_de_chile.pdfIn PDF document text
    • http://vujurow.rf.gd/ed_sheeran_and_justin_bieber_-_i_dont_care_official_lyric_video_download.pdfIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_9a7e2a94334d42ef98bc16473a00b942.pdf?index=trueIn 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_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 4908 bytes
SHA-256: 99cd976e3cda5893759ab7d1048d9fde1953bd67ccefa32dda61e9aa92eb88a9
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 10852 bytes
SHA-256: ded6c85dcbd81ca516004f0fa356d05c236519db852ce8829104be6a28261729

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