Malicious PDF — malware analysis report

Static analysis result for SHA-256 d010bed5b6509909…

MALICIOUS

PDF

69.7 KB Created: 2021-02-24 12:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d800738a448ae555ab2b176ba9a5c75e SHA-1: 2e08791c65d0b75497fe6dd3027e589688ac575e SHA-256: d010bed5b6509909431f7b2519ef486219b53bb81b387bf5109186ee72ece631
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 0.9998

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://jottigo.ru/strik?utm_term=how+to+connect+a+new+remote+to+a+lg+tv PDF link annotation
    • http://korsabarca.com/pronouncer_guide_spelling_beeniijr.pdfIn PDF document text
    • http://faceit.su/ludo_king_mod_apk_unlimited_six_onlinemvzmk.pdfIn PDF document text
    • http://help-igcopyright.xyz/day_planner_template_microsoft_word97x8c.pdfIn PDF document text
    • http://buyfastedcircle.xyz/124385252605y1yl.pdfIn PDF document text
    • http://testvvd.xyz/fofamuvetasifewuwifl5hvm.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/4400210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_603239c3bd659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fdc202bbe357.pdfIn PDF document text
    • http://blankid.ru/18222643654n396f.pdfIn PDF document text
    • http://shoop-ft.ru/tratamiento_del_cancer_de_tiroides8u8wo.pdfIn PDF document text
    • http://xteenware.online/madden_mobile_free_coins_no_survey_nh44xs.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/kudanem.pdfIn PDF document text
    • http://bbcua.site/48478463016lxlp1.pdfIn PDF document text
    • http://wawovotem.22web.org/job_progress_report_template.pdfIn PDF document text
    • http://wwnews.site/acer_laptop_charger_price_in_qatarufk2s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavinudoj.epizy.com/office_word_business_card_template.pdfIn PDF document text
    • http://wekumut.epizy.com/united_health_care_prior_authorization_medication_form.pdfIn PDF document text
    • http://golagesobowe.epizy.com/laurentide_ice_sheet_pennsylvania.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_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5056 bytes
SHA-256: 04f87b0b6c5af6300d7f10aeb989bdc9a321cf3e61f914b135ded471536fe9bf
font_01_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 10360 bytes
SHA-256: 4646d66abd72dc59290a4eb4dc49d13ba3fcfcde625468a861cf6c7cb0ce599d

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