Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68295489d5a7f35…

MALICIOUS

PDF

85.2 KB Created: 2021-04-02 13:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf992a9e73e5c68091de3d55ee118704 SHA-1: ae6274ab2a90f536f130b5fda5d5592f0df1f578 SHA-256: e68295489d5a7f35f0f04fa511dbf9d1db8029af0df63a27418af6a76cdc8045
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=gallbladder+diet+list+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503387/normal_600ca14bdbdba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379377/normal_5feb96be86981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_601ac46a3283a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_60343374042dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ratadipemor.epizy.com/bukisepadamixanebutan.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_f5a4ac029f9b4d9da3ef97f8a9962578.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_ab18b4f6c11e425c9ef8c5b287643f71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6beac5-c679-4a60-a0db-94df398d880e/jaxuwidaxufosurezovas.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/58191491957.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/handbook_of_literary_terms.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_faffc988f92e4bc18ff70d6c429c9bee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/218689c2-d43e-44bc-9e59-6bc8df9e4bc3/rebecca_daphne_du_maurier_hardback.pdfIn PDF document text
    • http://gowepuxajotezo.onlinewebshop.net/japanese_alphabet_chart_with_english.pdfIn PDF document text
    • http://nugimuv.rf.gd/steins_gate_elite_kurisu_ending_guide.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_36db5ea09b844e5e946d7df2ce706d4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7efc5b-dc98-4d6e-ae90-a271f6c7fe47/world_history_final_exam_multiple_choice.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_af853abc8aeb4a64bc1e6f2b2ee886e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/budgetary_control_in_cost_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/how_to_install_lux_kono_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f32430a-8fb3-444d-bf58-563649733ac9/ea_sports_ufc_4_patch_4.01.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 4780 bytes
SHA-256: 35c5b7643bded03708b4f7991cb7dc73ca82e6ccb104c248528b1868b3b4ac6b
font_01_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 11136 bytes
SHA-256: 68440d4f510f7fc798189c18feecef16ea6e69745110a235a986c4e45312fc5b
font_02_sfnt_off0001397f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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