Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa82bee1ea282ef…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 04:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 237630d2195c6a3055ad089fb2eaad04 SHA-1: 94c0c69c109b4775cae127a0b7ffb31e9da6cea2 SHA-256: cfa82bee1ea282ef19be4b8822ee98977db8eb121f126c0352683f5b985900eb
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 0.9997

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://leonvi.ru/wix?keyword=amy+tan+a+pair+of+tickets+pdf PDF link annotation
    • http://xaxifibipebux.iblogger.org/personality_test_colors.pdfIn PDF document text
    • http://voyazh-shina.com/68374004604xp4qs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365555/normal_5fdea4cf061df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450419/normal_5fefd200b545e.pdfIn PDF document text
    • http://help-ruleviolation.com/what_is_max_bears_net_worthzn7tz.pdfIn PDF document text
    • http://devgame.design/lainitas_primer_grado8v5nt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folefozupo.rf.gd/51812949788.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/alkaline_diet_food_list_dr_sebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e12648-e44b-4ab9-b1b7-452c5e0ca2d9/how_do_you_open_system_preferences_on_a_mac_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42542680-f6d3-4556-83cd-0d3b6d5348c2/dell_optiplex_gx620_bios_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40345da0-41c3-4781-b6f4-9d5542c5d3e6/mod_pixelmon_generations_1._12_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3b6b79-5785-4d1e-b2b3-a1fc61225008/94992565850.pdfIn PDF document text
    • http://dojiseb.epizy.com/61449818902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f15cc5-4b3f-427c-b819-ce78047eb99c/wiboremurav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b946b52-ca12-48ff-a257-2c65e976240c/how_to_write_a_song_for_beginners_wikihow.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/xiwum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3b6af2-d93e-4d0f-9fcf-24bfaf0a7ff9/ozeri_zk14-s_pronto_digital_food_scale_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/zulolizazisimemev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa3cc08-a931-44a0-ac60-a5b9ebb25ec2/34775062840.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/woxir.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_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 5424 bytes
SHA-256: f995d0b59976e9419fe54b260dbd9aafcd3ba931ad7c278f65e320fbeb94320e
font_01_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 10544 bytes
SHA-256: ff09944723387c3de6fbb95f5c820e3c414846a121e78cf78b23905c63634954

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