Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ff3b103c2fa13e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-10 02:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 77359e1093b214fa9af21d259bf9c0d2 SHA-1: 827352b6f1a73d2747f7c8d691c5e0ba34901e1b SHA-256: 42ff3b103c2fa13e3469a740c8bf0ccf8a8635a63c5bfeb79a384a038b564a97
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=airlink+747+map+pdf PDF link annotation
    • http://doxewoga.iblogger.org/exercise_synonyms.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/convert_ft3_to_m3_s.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/accounting_concepts_and_principles.pdfIn PDF document text
    • http://lnstagramcentre.net/ice_hockey_equipment_store_near_mebwja2.pdfIn PDF document text
    • http://dezoxovozabeluf.iblogger.org/ford_explorer_xlt_2002_fuse_box_diagram.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/xivujetoxebofovezu.pdfIn PDF document text
    • http://mavito.online/koputorojagubijunaq5t0b.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/burilinijuwovifupogidume.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/34850796112.pdfIn PDF document text
    • http://my-favshoph.online/cen-tech_digital_multimeter_tutorial0o0s1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kalawutef.rf.gd/ielts_book_9_listening_test_4_answers.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/birsen_yaynevi_hidrolik.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/2005_chrysler_sebring_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f0f482-731a-4188-8dc1-64cd2d21dc7b/best_book_to_learn_html_and_css_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b8aec6-7eb6-4c3e-a5f6-27de6beb84f9/82333490957.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/76416193429.pdfIn PDF document text
    • http://fukodagugino.rf.gd/44166696486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81544172-ee17-400a-8d12-414e12b4a345/how_to_use_6_cup_aroma_rice_cooker.pdfIn PDF document text
    • http://purubonosarule.rf.gd/sugasezolo.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/que_significa_la_fotografia_aerea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50373093-cdd2-448c-a2a6-120065d519a8/java_8_collection_api_changes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9ce5ea-4b2a-4f8c-addf-1f21de6de723/what_are_the_milestones_for_speech_and_language_development.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lewoxaxazu.pdfIn PDF document text
    • http://sufumawug.epizy.com/74324110582.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_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 5232 bytes
SHA-256: 12e41c47bcf54158185b339a4e33e5c7e7494f7656171dcde11b593fcf211653
font_01_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 10656 bytes
SHA-256: 55db37469793977db40ea4404eaae0d21075e6997cfb1d4c92f12494939f9b5d

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