Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1877f8908ca49d…

MALICIOUS

PDF

74.6 KB Created: 2021-03-11 01:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 779fe515ed81e5c60b1928a6a04309f3 SHA-1: d3a3b74a244d38e386df453a4b4befcd70f694bb SHA-256: bb1877f8908ca49dbf1c5d0547489e78a0ee859f1c4eb9e909c1a505fb4865f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links pointing to disposable hosting, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous external URLs are strong indicators of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/123?utm_term=disney+character+faux+leather+sheets PDF link annotation
    • http://kvrovk.xyz/how_did_the_cold_war_affect_the_environmentmm7gs.pdfIn PDF document text
    • https://foguvebosep.weebly.com/uploads/1/3/5/3/135315209/1217075.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/54Lhdhf/96402961485.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/cUytia9/76036874728.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/bad9b0e0e7e1b36.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/ziduwuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/jfXTzho/29384913143.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/cwZQbkm/word_connect_answers.pdfIn PDF document text
    • http://pokupka.space/bandura_self_efficacy_theoryd13cm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_eb0f79f996064b2a83c9a16cc07fbe9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77633485-2db1-4628-b99b-7ae5e2257343/how_to_do_the_thanos_snap_effect_on_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed27e94-4f7f-487d-936f-07f92b0bbd21/94822999236.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_eb12f01152cf4282b049e90a781c2f16.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39774e3-b5f3-468d-b9f6-36e9b07df241/a_short_history_of_the_movies_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4863ad3e-915e-45e9-b2bf-64dbdf2e177f/fijilojuvabuvagap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95a1f3a-2c60-4aae-bd9c-2810f8bb5c65/wolf_gourmet_countertop_oven_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb5b6bd-5938-4cfb-a275-5ea161334ace/bluetooth_keyboard_and_mouse_for_ipad_pro_12.9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ef75d9-c40e-47ab-861c-53aae7e85c18/69140481280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685064a1-49f5-4407-a650-d7a71d098aa5/simple_compound_and_complex_sentences_worksheet_for_grade_5.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_4efa7de2944d474c8369094fb4490799.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d56d37-85d7-411f-ad22-bbb1f4e55998/how_to_reset_trane_thermostat_after_power_outage.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 5136 bytes
SHA-256: 04444999e6cc5e6ca53d611263e8f9184766facaede8bbdae858e15b27aad4bc
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 10824 bytes
SHA-256: 5b9c521b5beedb66bdf1e2e100d786e6c8a13d24d4bef41303dd49c366ee4461
font_02_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190