Malicious PDF — malware analysis report

Static analysis result for SHA-256 07959e8b0c37cb6c…

MALICIOUS

PDF

88.4 KB Created: 2021-06-29 02:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1268fa9f19d248e5606fd07429592b8e SHA-1: 3cd23065a4f1f219f57c62a6defd3b7515892ba1 SHA-256: 07959e8b0c37cb6c985949ef2545cacc423149380411c6a68ab25950a0967e6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and compromised CMS upload links suggests an attempt to distribute malicious content or redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=pubg+5+finger+claw+layout+code PDF link annotation
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a2f099d3e---20735412260.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1624917986.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0db40ebba380828721e575e8dbaa371/3548293210.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/pitudokux.pdfIn PDF document text
    • http://clipsttm.com/userfiles/file///82405239796.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/50792449658.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce457470384---jidinexofixevulujujol.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608395c06ea81---vemaz.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/gowava.pdfIn PDF document text
    • https://bataretak.com/img/files/file/70570483972.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/buzupuxikod.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/pinumokilurubejiradif.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c34087250ef---76455895531.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/255df01856fd660c5dc74c9896878ee7/jezulazulobelaxezigeze.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f32a2bee62ec7535ce812b0f1affdc48/gifadoxazigo.pdfIn PDF document text
    • https://scriptdd.com/_file/file/81739953237.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/digolemudejevunuvofu.pdfIn PDF document text
    • https://agatanorek.com/files/file/turelixisefoxusabup.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a03d78966e---xujupigupunajipud.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/013e51da672a8f507270d49269ce7338/fonojezisuwegogorisene.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/zizawizopezukufisamedi.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e91a6ad614eb1d47f68c3bcb5d78bb7b/70249718442.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD181 1716 bytes
SHA-256: 6fa1b89d6dec54f19b3769140093c5b025ea1d52f79ad04439e2c215bb9d700c
font_01_sfnt_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 18156 bytes
SHA-256: 578ed588ca92121d71d3a79004286350242bb33856a87fa3f80cabdb44cc5475
font_02_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 11060 bytes
SHA-256: ea376e5188c5443eaf03f19a9e30a4c0b698e6af5e6d8fde53c8e6820e993a4b
font_03_sfnt_off00012364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00013b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B75 16296 bytes
SHA-256: fb538dbd7e989b4ac5420c5e167e6f02be54adf6e377e122bde298b7168f32dc

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