Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d1d006baca9fdf…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 17:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 980df1ec38387d7b3e4ba770fed9a130 SHA-1: 58406807fdabd90875f30839baa2bb2358d28000 SHA-256: 43d1d006baca9fdfa3f8f226f324289f59f81232f8a1440c4ac43bab5ecbca66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://resalured.ru/wix?keyword=do+love+spells+work PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482872/normal_5fcc82f429700.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/72054519134.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/75800544104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5ffcba8bd3a53.pdfIn PDF document text
    • http://lefewibek.iblogger.org/lufovowam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5fdad9d70090f.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/kedusolefizojabimarosaf.pdfIn PDF document text
    • http://jogebavipe.iblogger.org/video_cutter_library_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_60403c0a68e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_603360c50a2c5.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/puxagetus.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/learn_how_to_do_currency_trading.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/sosugop.pdfIn PDF document text
    • http://bimatixazokepox.22web.org/97185818045.pdfIn PDF document text
    • http://bijowuxupolapi.sportsontheweb.net/sample_treatment_plan_for_bipolar_disorder.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/widuxade/agilent_gc_liner_selection_guide.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/micro_expressions_lie_to_me.pdfIn PDF document text
    • http://namezenidel.onlinewebshop.net/fupidopijuw.pdfIn PDF document text
    • http://meguwuzib.rf.gd/15478475946.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/gcse_maths_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/asus_router_rt-n56u_wps_button.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/12984431022.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/48769837537.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/29085554876.pdfIn PDF document text
    • http://balunepikejevo.rf.gd/36671501023.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_off0000ee04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 4816 bytes
SHA-256: eff4bf5c6e89f44534c0ce65b1acca1660f843e24ec271a5a2b0cc1715492b40
font_01_sfnt_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 10640 bytes
SHA-256: 921dfe71715caa21d8a8026beb7893b81160b61176f64fc07ef214e03679037b

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