Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fab67b61377d09b…

MALICIOUS

PDF

76.1 KB Created: 2021-03-26 07:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 986d37253473b2704c88d1fdea24085f SHA-1: 5cd05dbaf1789f2201fc1633063d0cbe57138c57 SHA-256: 7fab67b61377d09bb3618829b83cd324e52f10c8323e8fbeca41d87c59561e6f
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://bologen.ru/wix?keyword=volume+of+a+penny PDF link annotation
    • http://nekuwagibajese.getenjoyment.net/arihant_encyclopedia_of_general_science_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/PVE2jhb/nabule.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/ivjdmjf/word_stamped_on_cookies_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/Gkifiia/scannermaster_coupon_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5fd7bfc718309.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/ifhiIl4/77708426618.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/giSJsoL/kagivixuxomudedana.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/aa_pet_insurance_claim_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ff9e4af2e851.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/c8hb6hg/zutejemufeleki.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/sepulidub.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/gaifAjg/nezafagonusiroge.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/gchhvie/chicken_poultry_farm_for_sale_near_me.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/99317514215.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/1e1b2560-4d2b-4821-b867-f9685d18b702/what_does_e5_mean_on_omron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f97e27-e3e1-4418-91a0-400d02436fc2/jomidomife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b10cdb-dd84-4c31-9301-785a2c6d118b/how_to_turn_on_oil_heater_in_house.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/19200606246.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/mosbys_diagnostic_and_laboratory_test_reference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8632179-4c20-4de6-aba5-5f54a47fb9c2/what_is_the_current_wall_street_journal_prime_rate_today.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/roxuxuwesorakurubezozeko.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/todidulapometedikolemore.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/1134128349.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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 4840 bytes
SHA-256: 5b2aa0eae225421218aa52a8117d9b2b9b825cc929611d96c3451ccd2a4c2286
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 11248 bytes
SHA-256: d5bb11ca7f00f75844934e8cdce68c06d77e8788ec85eb3d931821e18d5eb7c8

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