Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a6e67e777f5338…

MALICIOUS

PDF

67.7 KB Created: 2021-02-10 19:25:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5a6958d3d13093b9b592a1c89597de4f SHA-1: 2b96258731f820d1a923d7dbcaea872e9c7f9fe1 SHA-256: 68a6e67e777f5338ed592364d966c15659659a5345f7a29bc6993d2e48c3e61d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wb?keyword=kalnirnay%20calendar%20january%202019%20pdf PDF link annotation
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/7959894.pdfIn PDF document text
    • http://supportcopyright.net/sufotikawiliwizewozifs42u4.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/0dgfrAV/69177171816.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/zicgdjc/zafadizi.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/iblhidB/dead_in_the_box_mod_apk_money.pdfIn PDF document text
    • https://bogigevaruzo.weebly.com/uploads/1/3/4/4/134435623/modevesewuwog-basegoziji.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/majuv.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/hiIEhbW/silitogafefokowot.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/wupixufekijax/90987355379.pdfIn PDF document text
    • http://fafalibowadavuz.rf.gd/feasibility_report_in_project_management.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/47859245780.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/wave_jobim_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/bakojanowemidakuveraru.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/81409568018.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/friendly_letter_writing_worksheets.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_off0000cb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2D 5600 bytes
SHA-256: 891ec5c41f2248c6e94b09260adbd925d81f0075207c4dab8bd8492a39dc0b6e
font_01_sfnt_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 10456 bytes
SHA-256: 800798bbd1bab86857859bbc976861fb96bb00ce19f5bce7c7d7348548587a9e