Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5978e25e7582c0…

MALICIOUS

PDF

72.6 KB Created: 2021-03-25 17:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f0e8e628c4e724fae1f64058682b396 SHA-1: 15852bb430e6b0e0c2e257119b3fb2d0007616cf SHA-256: ff5978e25e7582c09198f3b40e7169fb88b4a9421c33bac9991683b869fe28ce
156 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 0.9994

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 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://jumiwimov.ru/123?utm_term=digestive+biscuits+mcvities+nutritional+information PDF link annotation
    • http://easterthjg.com/63301106777vnm6r.pdfIn PDF document text
    • http://timujegewaverun.22web.org/ffxiv_chocobo_dyeing_guide.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/vepaku.pdfIn PDF document text
    • https://piwuwati.weebly.com/uploads/1/3/4/4/134404243/wokabisowi.pdfIn PDF document text
    • http://desofudexe.22web.org/kizuvizeledugek.pdfIn PDF document text
    • http://nawabopebi.iblogger.org/vidowefopodetepod.pdfIn PDF document text
    • http://strongcreditscore.info/why_la_la_land_won_oscargfry0.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/4810357.pdfIn PDF document text
    • https://rogelevosegadu.weebly.com/uploads/1/3/4/6/134651245/jafimowosapakalaz.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://s3.amazonaws.com/setikizo/pukepefapokofenepos.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/letra_canto_catolico_hoy_seor_te_damos_gracias.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/5960784502.pdfIn PDF document text
    • http://rovikejovejoto.rf.gd/rebizad.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/agenda_f1_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/2012_jeep_grand_cherokee_fog_lamp_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/spreadsheet_google_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/junawupigir.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/what_cells_are_affected_by_colon_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/sulokafokexeruzazov.pdfIn PDF document text
    • http://musovulazapa.epizy.com/suzanne_leonard_cohen_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/format_appreciation_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/49739308453.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 5280 bytes
SHA-256: 803ec0602c01fe2cec7012abef702aaccd0e42752c4c3906558c2279a6eef9e1
font_01_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 10584 bytes
SHA-256: 6460b1147aa67b88010782c56060ee16189222de7eca7de8721a1bd55039faa5
font_02_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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