Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0eec06c20eeb818…

MALICIOUS

PDF

71.9 KB Created: 2021-04-04 18:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 53a9301ecfb9976ad829561374a6ac68 SHA-1: b21acb60b469cd2460d64c564425de06a3a4b36e SHA-256: d0eec06c20eeb818b03c5eb00787b166c390df34273a773d539722ef4f6a16ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://dugedepap.ru/wix?keyword=real+madrid+vs+bayern+munich+houston+tickets PDF link annotation
    • http://mebets.xyz/graco_snugride_click_connect_30_35_and_35_lxszdvx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_603969a61e04b.pdfIn PDF document text
    • http://reawolt.online/how_to_edit_a_png_logo_in_photoshop7t17l.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/79277903258lq1an.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/nomokugalisepakiz.pdfIn PDF document text
    • http://shopwithsale.website/wureserasovjz4wn.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/new_coronavirus_cases_in_san_diego_today.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5fc7538651a90.pdfIn PDF document text
    • http://vas-rem.ru/sterns_introductory_to_plant_biology_14th_edition_answers3phms.pdfIn PDF document text
    • https://zofazozudu.weebly.com/uploads/1/3/0/7/130739697/xaserekedubod.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/nimomovoxowurokulede.pdfIn PDF document text
    • http://floradoma.net/jesus_mi_fiel_amigo_letra_marcos_barrientos4yy5q.pdfIn PDF document text
    • http://tuimag.ru/6442489298430k84.pdfIn PDF document text
    • http://foyou.store/how_long_do_fire_extinguishers_workpnzgc.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/gogoxowiniza/gijiredefufuxiwagapekir.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/babybjorn_baby_carrier_one_air_black_mesh_review.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_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 5552 bytes
SHA-256: 790d14912cac974df681fd6125a0dcc33020e84d59aef47c13897cc93f36c4e0
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10168 bytes
SHA-256: a71ef45363c48bf18a24c498319699ddbb564ff3f10e039d026dd71d566a253c