Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e880e6600e31157…

MALICIOUS

PDF

76.2 KB Created: 2021-05-01 10:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 60a86d20b53bac665e0b0efe8c08639a SHA-1: 59d311833cc9bb560e2ed0070d917153c9226feb SHA-256: 1e880e6600e31157e773b5e9d13cbe4880e1fd7e7e630865a0b37a014a48fc37
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://jacksth.ru/strik?utm_term=how+much+to+lease+a+bobcat+skid+steer PDF link annotation
    • http://bivaxosufuxibo.mygamesonline.org/17956024138.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/9ggu1jg/bopilevitabowoxiwe.pdfIn PDF document text
    • http://businesshelpservice.com/how_to_buy_online_and_pick_up_in_store_old_navyvvpxk.pdfIn PDF document text
    • https://cdn.sqhk.co/fopajuxalaso/QLgjhh9/stickman_project_gameplay.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/pabivawama.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hdjeAjg/zombie_don_t_run_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/jcQF80H/koala_crate_garden_instructions.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/ancient_maps_of_the_world.pdfIn PDF document text
    • http://sreda.city/liburafelewirusazedk7mi.pdfIn PDF document text
    • http://gijofabenetawix.66ghz.com/vodod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_191d8089c7ed45ceaed2c04ba72e6277.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_82c43be705a84cbbb04991c67a10b339.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c50cd34-4584-4eca-969a-0ffbd703b251/options_trading_books_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1542bab5-6066-4ac6-afd8-2a21ce651ff7/wemaxuv.pdfIn PDF document text
    • http://gizimup.epizy.com/jikesabatodazen.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_5f5f26ffb9ea4e9b8ed4e897883cc666.pdf?index=trueIn PDF document text
    • http://jasosuwer.epizy.com/gurps_character_sheet_explained.pdfIn PDF document text
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_3c6796c0e0204140a339c27dca2b399f.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_df7203af00bc4687af44b119eedd3c72.pdf?index=trueIn PDF document text
    • http://samutusizezos.epizy.com/mineral_wool_2_hour_fire_rating.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_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 5436 bytes
SHA-256: 28511162590e9230b88b694ea21591ce095bf65221291c850d363fc5809817ef
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 10164 bytes
SHA-256: ad1312517fbbce4711dda6e9fbce526bcbd0ec6fdcf6f8622e880bdf64b1f50a

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