Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed29bcf715c368d7…

MALICIOUS

PDF

88.1 KB Created: 2021-04-06 13:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 01e42fd106146f1184bbf2739cd13bf4 SHA-1: 560dca781bdef297292ae532285af30254264668 SHA-256: ed29bcf715c368d76cc55ae1b7e5a2697bf8c427fa10b834931f2964ca917711
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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 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.
  • 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://crophysi.ru/award?keyword=fairy+tail+story+in+english+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463532/normal_5fd6dba825075.pdfIn PDF document text
    • http://shtangye.xyz/what_is_causal_factor_in_psychologyefqfu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6056dd9b23c20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fc9abd97d373.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/how_to_cook_ham_steak_in_a_pan.pdfIn PDF document text
    • http://winoraama.website/towokivuvopajebofamgdi8.pdfIn PDF document text
    • http://lessonsonline.site/xenisikinqdvw.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/840625009364ycjr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/pepabafaxisatezagu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/54499361382.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/academic_performance_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/how_to_fix_ryobi_40v_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/72330130788.pdfIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_978556e94ed642c8be382f2e9c5628ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/sopotifefadijanofe.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_f7feda53cf8947448eeb441a1f7b1eb1.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_1c8f21344f674be69b10693958af87f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metakibeme/1782419628.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/bad_boy_english_song_320kbps.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_1f6413853ff84490a7169f80d1829b73.pdf?index=trueIn PDF document text
    • http://kojenixerog.myartsonline.com/vutelusokiwokidenobagu.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/federalist_10_study_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 5360 bytes
SHA-256: 1b4302f445862d3117dcaeb72b123ab2cc289b0dcf7c8daf5fde2d0323ffa249
font_01_sfnt_off000118a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 10508 bytes
SHA-256: 3e68f6d5f03762d8df9c3430cd0e8db81c803d1b5d0672411b4f941ed5ab7f65
font_02_sfnt_off00013c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5F 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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