Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64d2945986af76d…

MALICIOUS

PDF

79.4 KB Created: 2021-05-09 21:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6e4e00ecf8ab8dc8bbd5706766edc238 SHA-1: b5e4b45020fc18e4f2e1ea472be3adfbf015f56f SHA-256: c64d2945986af76d32676259e7a56e866f6d0a00eab5f7958d0d84043c1d2672
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, appears to contain text related to postal worker holidays, serving as a lure to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/wb?keyword=what%20holidays%20do%20postal%20workers%20get%20off PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485943/normal_603edba476382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_603a8ac968364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5ffd2d92be9d2.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/5hgifjd/free_ear_wax_removal_clinic_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sumavevop/jehFigI/hello_dolly_bars_recipe_southern_living.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_6019d0ec995f6.pdfIn PDF document text
    • http://216tilford.com/3_views_in_engineering_drawing2l2h9.pdfIn PDF document text
    • http://gutprod.xyz/vafakivapepitodexenufafrg64o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_606e5c34be69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_6061435c781bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_601bb19872283.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/Uhcgghi/kuteledivigurukisaribap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473619/normal_5fcbc249f1584.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473375/normal_5ff8c6b3f28ea.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/d7e2fe67-1fd8-4e49-ab2c-d89f7871307d/how_to_make_a_scatter_plot_graph_on_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/pepulijokomalisemal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94233d4e-f050-4506-9f07-430678e25ea8/which_of_the_following_is_not_a_phase_of_mitosis.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/test_lead_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d564fd-9d95-4d58-a09d-c1a0a4ff4c24/red_dead_redemption_2_strategy_guide_hardcover.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/78927580789.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/ffbe_fallen_ice_bird_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/gift_acknowledgement_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58620d6-7d8b-4b86-8514-545b9076f65f/d_link_dir_615_username_password_incorrect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9438b2-c008-447a-a3dc-6c2914f7a5c7/how_do_you_make_garlic_cream_sauce.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 5576 bytes
SHA-256: e6f2b92dcc0ac88e3a340da2c3c17b1761f4842161a46964aeb936d238d1e508
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 10960 bytes
SHA-256: a6186b3e46d815f30287d99f5e538e52cc2c0263be9b7b8390c5d86b4aff4069

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