Malicious PDF — malware analysis report

Static analysis result for SHA-256 5466faf8586cdcc4…

MALICIOUS

PDF

93.1 KB Created: 2021-03-29 11:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc55dad1f316dafd28569a313b2fde92 SHA-1: 17b5bf3573454141f572be22747d4832e2a260e6 SHA-256: 5466faf8586cdcc43c2f1c72e90ba95b302d1c4ccb68ff6e525a6a6ab58e1238
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-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://bologen.ru/wix?keyword=ikaw+lang+ang+iibigin+may+10+2020 PDF link annotation
    • http://sikazigazes.mypressonline.com/how_to_recline_evenflo_triumph_lx_convertible_car_seat.pdfIn PDF document text
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/5803248.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/atc_code_list_2020.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/54822505111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fe480aad6d4e.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/poxunixomavex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5fc73f2338750.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/gunujose.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/dugizis.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/c037cd88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_6056ea73790f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_602ff5c631a89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_605d89d84bb87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5ffba2c5b9226.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367961/normal_5ff580943f271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_605ca595a6358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5fda3825ab46b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bad71cd-4af2-46a1-a603-ab052e38f4fe/67555291544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e07300-7c84-4b6a-bc60-e34a0675b87b/tm_meditation_technique_free.pdfIn PDF document text
    • http://polabufu.myartsonline.com/jopukixuxujijerod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723a2283-1791-49c7-b89c-9caa68095194/50620124154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8c5364-660b-4e08-9109-8bbfc0e34108/26317908499.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/24144126297.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/3048268711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3095d6-3baf-48c9-9cde-74e00f6bb12a/how_to_reset_epson_xp_600_ink_pad_replacement.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_off00012dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDA 5392 bytes
SHA-256: f449232d9a2ff79d49123d240529e9b42a52ec41d668f2f7a42cd1f3929097f7
font_01_sfnt_off00014049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14049 11304 bytes
SHA-256: f4d2fc2a4955e108ed4987693123d36b0c9b92689d6d09aa02b3d5b0a99ec196

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