Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a543030b02a7015…

MALICIOUS

PDF

84.0 KB Created: 2021-03-26 00:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14ae6d28b8a2ad3d8b5e3e881558e327 SHA-1: 54bf2c0d8df04994ec639f07818bd3db19f8393b SHA-256: 5a543030b02a70156b3fdb4ba1f2614974ab8bb13bb455db21b96954f99196cb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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 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.
  • 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://jacksth.ru/award?keyword=fusionner+plusieurs+documents+pdf+creator PDF link annotation
    • https://cdn.sqhk.co/lutuganoda/sgcMhaO/turbo_kit_for_honda_civic_si.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/QsnBgeQ/ludo_game_play_online_4_player.pdfIn PDF document text
    • https://cdn.sqhk.co/puwonereb/t5hhCje/fold_up_electric_bike_halfords.pdfIn PDF document text
    • http://padlamadla.site/book_of_acts_questions_and_answersbf5l9.pdfIn PDF document text
    • http://koprovk.xyz/how_to_fix_a_squeaky_samsung_refrigerator_doordarxp.pdfIn PDF document text
    • https://cdn.sqhk.co/nugegigoxaxe/YT50e7a/totoxudajorunudimijuboxe.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/7iagdsg/79469678009.pdfIn PDF document text
    • http://siteznakomstv69.space/why_is_my_samsung_tv_blinking00tge.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
    • https://s3.amazonaws.com/vonuxagupeduze/extended_essay_guideline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b1bf45-3ba4-4763-914b-6779c35c6938/jeginenuwokewu.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/vokeva.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/kemumedovosonupuxipovameb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e53121-bdc1-42c4-99be-102e7ed208b6/99692993188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b31489-5210-4a74-903e-335d316ecd0f/ruxofonofisux.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/atwood_hot_water_heater_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/ultrasound_guided_renal_cyst_aspiration.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_5f867110f6f84311b072652b8265b847.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_2847aa259ef64c2d9f459d007944f18a.pdf?index=trueIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_1c3b57a1a30742ef82db692951a560a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/driver_booster_3_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310dd81e-8bea-462e-b366-f6be3a44f3ea/megoboneli.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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5140 bytes
SHA-256: 45978af343f4a2181a3aa80a3be2551b34154ae54e06940916753adf79e34b9a
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 13788 bytes
SHA-256: 51c9332f3881d839808c0f7588c1af379ce3b06a28b5dd405e5b2cdf5108e861
font_02_sfnt_off00013296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13296 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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