Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0c7b4658b70bb7…

MALICIOUS

PDF

84.1 KB Created: 2021-03-25 01:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 53442501ef9469e373b8e66093d46866 SHA-1: 119d7047aa9b9ade38455827afad4e6467956ab3 SHA-256: bb0c7b4658b70bb7304fa1b0a4388aba4909e192bd284f1e08f06d0d69514b41
166 Risk Score

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 0.9994

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xezojetit.ru/wix?keyword=brazoria+county+court+records PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5fdb084fbeb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_6055f61a5e380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5ff427d48208b.pdfIn PDF document text
    • http://omerkatanalp.com/how_much_does_it_cost_to_transfer_characters_in_ffxivbusjn.pdfIn PDF document text
    • http://devgame.design/best_caliper_guide_pin_greasetoe5y.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/EMgM6jg/fujanineba.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/giiigey/riranamuxasem.pdfIn PDF document text
    • http://loginwithfb.site/66707213345ievap.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/kebarumibilemavobotaf.pdfIn PDF document text
    • http://myluckywin.site/the_14_day_fertility_meal_plan_free4zhb0.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/gurovuwunubebukumimarum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489415/normal_5fdd32f47d970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_603e47d54c3c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_6005a65b1a8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_605aaa050fe7b.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/lvDhiid/singing_pumpkins_projection_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_60255ef7156d9.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/Romjdgd/cb_insights_pricing_model.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/d379b927-67e0-4e93-902d-f52d7da92e26/char-broil_performance_series_4_burner_gas_grill_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444cab1a-55de-4fa6-bbd5-2e6ed9eff61d/what_types_of_book_genres_are_there.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/ccie_wireless_v3_study_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7fbab8-5f87-4cbe-8899-7299187ca452/blues_guitar_songs_tabs.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/16444034369.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_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 5100 bytes
SHA-256: af8256b6ca93a03e111bb9b484448b2c413dac88a11c0bed4455a7c8cd41e745
font_01_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 10548 bytes
SHA-256: 1b33361f83f27cf28b2113a5c0314bfc1ad65a17ae9b40f96b5d55c1d511c3de