Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaa7ab9633fec0f…

MALICIOUS

PDF

73.4 KB Created: 2021-03-14 09:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c17eb07de1682bfd3448b64d6440b81e SHA-1: 2ea4efcadb788496cf0ca9288a78695c431b1cc6 SHA-256: ccaa7ab9633fec0f4e07997c0ca5e8d8a746002e5bc77b91d4ea38c540e523fa
186 Risk Score

Malware Insights

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

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 0.9956

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=top+malpractice+lawyers+in+new+jersey PDF link annotation
    • http://kazimibi.getenjoyment.net/54863218474.pdfIn PDF document text
    • http://meetsoda.pro/769675505240h72g.pdfIn PDF document text
    • http://axecheat7.xyz/find_duplicates_in_excel_worksheets1bvfp.pdfIn PDF document text
    • http://doxalasi.mywebcommunity.org/where_is_reset_button_on_adt_alarm_panel.pdfIn PDF document text
    • http://makedctl.site/rope_file_binder7755e.pdfIn PDF document text
    • http://arenaprobet.com/73396311420gt9m0.pdfIn PDF document text
    • http://milky-rp.space/surah_ar_rahman_dan_terjemahan7u18o.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/agatha_christie_childhood_quote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_2cfd6b36b3e44be0895fdcfa4b3bf642.pdf?index=trueIn PDF document text
    • http://tifavamifikas.myartsonline.com/66419377512.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_0092cd194dc544f8af8a031daef03d38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xipavir/insidious_imdb_parents_guide.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_5c92625e86d4420fa0af9e160ed162f3.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_d4278ae3622b47da83cfc1be6b57df55.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_2702a71ef9264020883e877d0fe9c2c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/format_code_in_android_studio_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/54353804629.pdfIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_95e0e16bf22644db828eaf849f2c7c36.pdf?index=trueIn PDF document text
    • http://pisonepegosa.myartsonline.com/44603610979.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_491d76947ce74132bfa512459d3b210e.pdf?index=trueIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_4ca1e4e92d7a4717b02d49be637b2b70.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_54849525c2c049f2b92edbacb7f2d03e.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_f1803aaa0d1844bb8fec3a410ebfb70e.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_a9451e50db80492e877b1173a9c3a746.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_5754b367154048659c8919f8b1d4d980.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/71548289491.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_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 5300 bytes
SHA-256: b57a952a6bdff273b51d2ef719f08f53622fd2b634b0947b5882899a0edaf63e
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 10772 bytes
SHA-256: c16f03edc7679b70fdeb953f05e8bc99a70fb14108889e734ee439d8176f76d1