Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0058fdc0752fe2e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 15:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e033cf780b21ea72d4cfb62092eebae9 SHA-1: bbfa9b5fb7034cc7f131b0928867c1ea98a59cfc SHA-256: a0058fdc0752fe2eeda856d34c336beca26c60262aba2cba38ad44db5910ec60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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 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://inwebjor.ru/uplcv?utm_term=tarot+spells+pdf PDF link annotation
    • http://budka39.ru/files/21907668872.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/06/file/20707211412.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/titupepuxumedivafen.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/57770951564.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/vegopilipofalozoveviwute.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/51527747011.pdfIn PDF document text
    • http://arsvet.ru/img/upload/10308028008.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/66095390969.pdfIn PDF document text
    • https://topupdana.com/contents/files/56809400211.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/kigakepebalugu.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/jerikolane.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021090810515580554.pdfIn PDF document text
    • http://upakuika.com/img/file/20814401876.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/58580055694.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161454d1c863fb---67447100704.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/82532416992.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/vadukomafigiba.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335e5b57dd5---naxewerobadu.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109171505105995.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16320436301356859195.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/favenupegiv.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/39676653996.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/25821273897.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://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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 17992 bytes
SHA-256: 21c61dcf3f350c3712b1fd7242a123d693dd63db52bbfdf247c497b2d2737fc1
font_01_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 10256 bytes
SHA-256: 2b28c764e173eba8aa7bcb1e1b896031ba783cf32e65cb4e2d5289e61d5975ac
font_02_sfnt_off00011eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.