Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abe6641fb8f6683…

MALICIOUS

PDF

182.7 KB Created: 2021-04-08 04:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc50e8997078fe2b4f1833eebd25a9d0 SHA-1: 21c1757d4ab904d84609cf5d3710aa4aa1532cd5 SHA-256: 5abe6641fb8f6683bff1495a1066ef3e122a99ddc42d00dd60cf4ac81df146ec
126 Risk Score

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 0.9905

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://maypoin.ru/wix?keyword=%25D9%258A%25D8%25B2%25D9%258A%25D8%25AF+%25D8%25A8%25D9%2586+%25D9%2585%25D8%25B9%25D8%25A7%25D9%2588%25D9%258A%25D8%25A9 PDF link annotation
    • http://white-x.fun/punubuwerelufekusubeu94m6.pdfIn PDF document text
    • http://idealicaitaly.site/pubg_lite_vcruntime140._dlledxaw.pdfIn PDF document text
    • http://power-guard.shop/data_science_online_certificate_programsmzmpr.pdfIn PDF document text
    • http://wide-take.top/comfort_glow_kerosene_heater_gc11b8wdt1.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • http://lisolu.org/kejenetiqrnhx.pdfIn PDF document text
    • http://mpvideo.org/if_else_angular_2_templatejr9rq.pdfIn PDF document text
    • http://megatorg.ru/sukabuzidofipuxobisajikyu2z.pdfIn PDF document text
    • http://drnextact.xyz/63426439909a3vbw.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/voxejiroru.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/diary_of_a_wimpy_kid_wrecking_ball_free_download.pdfIn PDF document text
    • http://zerkalo-fugicar.website/kiloblocks_lite_downloadhzn8r.pdfIn PDF document text
    • http://snatural.space/12323594714bx8jn.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/la_vie_en_rose_chords_piano.pdfIn PDF document text
    • http://blog-millionaire.buzz/supomizeoduzz.pdfIn PDF document text
    • http://whalesqpa.fun/majajuvexuxebobazisonatepvdhnb.pdfIn PDF document text
    • http://triple-doska6.club/19473305178qq07k.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/what_is_a_metaphor_give_me_an_example.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/vigovelewipepobul.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/nerazixoxazisumefi.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/suzujewa/pazikefudipajolebor.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/39288401737.pdfIn PDF document text
    • http://pewubik.atwebpages.com/60129744891.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/marvel_contest_of_champions_mac.pdfIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/colour_blindness_test_file.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000280c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x280C0 34720 bytes
SHA-256: 5bec682bec5699825451277f7546a046019d7420ce8477d50b906e1da2ad8791
font_00_sfnt_off000239f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239F4 3396 bytes
SHA-256: 8ad2bb29851bdd7a5ab1ba16dfb395f1eec87213095ff6a7d7030976db4ad16e
font_01_sfnt_off000244fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244FD 9992 bytes
SHA-256: f1b0433f65c6e152ef184f40fd9ad40566726fbfb884a69b780e718f7e2b265e
font_02_sfnt_off00026770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26770 17236 bytes
SHA-256: a1cb841a261ec2d5e9a90c255bcce62c0911b01d0323ed87da9cf97dced4d177
font_04_sfnt_off0002bc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC65 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333