Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de62a223c67e2bf…

MALICIOUS

PDF

80.3 KB Created: 2021-03-27 12:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6047261111da4d2c27683bd997ef8ff2 SHA-1: 8f7e1a356dabcc1a5456f104b90c6edc7f42619e SHA-256: 0de62a223c67e2bf80496cb03e1d64adabe24895392807a8088b9f902d3a1bc1
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 0.9990

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://xajibur.ru/award?keyword=beef+steak+recipes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455669/normal_604156155afaf.pdfIn PDF document text
    • http://cmbclientes.com/vamalemoxisuserevopagi1gz.pdfIn PDF document text
    • https://defuboxuzunusam.weebly.com/uploads/1/3/3/9/133986960/jadagumiben_lekibe.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/50015024017.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/dale_carnegie_how_to_win_friends_in_the_digital_age.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/8753245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_5fe983fc173a4.pdfIn PDF document text
    • http://mysteps.online/monupg9pjq.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/3705566.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/f0d9a65df048255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_601ecb1862e94.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/3778767.pdfIn PDF document text
    • http://fastpysystem.online/87018032624vo1nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_60438902ddb5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600ff8f4b09f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_6e911c2dbce64b31a4efcffcbff2d6d4.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_4cffad30173a415c9f91c53f69957fdb.pdf?index=trueIn PDF document text
    • https://ed457e25-7262-4bf7-b769-9a3df1da8a49.filesusr.com/ugd/60ac0c_99ae0266bbfb42aeacf90f2e0b89d691.pdf?index=trueIn PDF document text
    • https://78f5967e-1348-44d0-b43d-4fba71d4c3e7.filesusr.com/ugd/a94f6a_ab5fd7be0c494bccb29226b440f01b60.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_4061ee4ed00949b9a42459737925ebb0.pdf?index=trueIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_966b29ccda3d452c8a125c46fbe746e9.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_29cc33d41dd7423e9aca2e395d510262.pdf?index=trueIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_8e67d681e2df49e3915fc00403f99c32.pdf?index=trueIn PDF document text
    • http://wudazebej.atwebpages.com/what_is_metaphysics_in_philosophy_ppt.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_aa4e05407924493a982fd969126937ab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 4804 bytes
SHA-256: 17d78205c6e52f15b7679111d0b3c96cf84d41e78e82c5d49a13ca7156d9fe3e
font_01_sfnt_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 11008 bytes
SHA-256: 85168c68e1f24f4a23df1f18a8e067cddb5a6dfb4b14127eb824d8063dd3d56e
font_02_sfnt_off0001259e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333