Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dd598519dfefd2…

MALICIOUS

PDF

77.0 KB Created: 2021-04-01 11:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b49677284288cce99c168009fc322193 SHA-1: b08b5bde802c19f1fe23e97ec9e595d434067aa0 SHA-256: 59dd598519dfefd26101adcdf59b310481817d1c6d24b85e3ed642ccbe16d993
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/award?keyword=curso+completo+de+apicultura+pdf PDF link annotation
    • http://copyright-notice-ig.com/73656918959g4rvt.pdfIn PDF document text
    • https://rufufuwoka.weebly.com/uploads/1/3/1/4/131454634/8240559.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/fmAjbge/muzavekobebes.pdfIn PDF document text
    • http://erogan-encolumbia.site/sukupezemelu1aw6p.pdfIn PDF document text
    • http://rfs.team/besos_de_chocolate_libro8db5b.pdfIn PDF document text
    • https://rowaxomizubo.weebly.com/uploads/1/3/2/3/132302787/kudorur.pdfIn PDF document text
    • http://everydays.space/information_about_annular_solar_eclipseq80lv.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/ijIihhj/55671485183.pdfIn PDF document text
    • http://appless.space/garmin_forerunner_745_release_dateuxwal.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/vumopojupa_dudikes_vedetodemiso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d1f520-6fa6-4c55-8459-8c94f3d1c7c1/smoothie_recipes_easy_healthy.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/fusigijadovipen.pdfIn PDF document text
    • http://kowopiri.rf.gd/photosynthesis_sas_virtual_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4867b515-d150-4d73-bec3-2b61059c766d/how_long_should_soda_stream_gas_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a218444a-3965-4a83-9543-ae99dda3f77b/koxesetobinogipi.pdfIn PDF document text
    • http://komivarutu.epizy.com/70346730147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e241e36d-de35-49b9-91d1-ec605851b2a9/2013_dodge_charger_front_bumper_and_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd40097-cf76-4ad8-814e-3a22eb009ebd/how_do_you_use_a_hoover_spinscrub_60.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/ashoka_samrat_full_video.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_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 5208 bytes
SHA-256: c114c0d9f6b7062ffecb7ae51f647c5a82945c12bf7d03f0f230be541a10be17
font_01_sfnt_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 12108 bytes
SHA-256: ffdba09a47f8c43b3ed930b9d9ba76125ac64732dbd6125a01fa92a6494528e5

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