Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cc7fab983d7ff3…

MALICIOUS

PDF

96.0 KB Created: 2021-03-20 20:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9fa8c31133ef692088615ac398260ce SHA-1: b7d5a77ac58668f2540c5fbbd29e1ea8ef7d28f7 SHA-256: 00cc7fab983d7ff34d30cb385ef107f6a4edd461f5d027f958fe52509921c45a
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/award?keyword=vocabulary+words+pdf+for+sbi+po PDF link annotation
    • http://hamsterbig.com/how_to_communicate_to_save_your_marriage_after_financial_infidelityhllvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401976/normal_5fce937766828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fdbe60bbb949.pdfIn PDF document text
    • http://compte-cmbretagne.best/37637056525n7pxk.pdfIn PDF document text
    • https://cdn.sqhk.co/faxonudogot/HnP2Xge/xixede.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/excelsior_definition_greek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425929/normal_602aac34bd4d7.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/WarhhTL/color_mix_hd_mobile_wallpaper.pdfIn PDF document text
    • http://xxlmature.site/23367309028jfvmy.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/jfehjhd/fire_wallpaper_hd_background_love.pdfIn PDF document text
    • http://velesvoyage.ru/10196447226fs7ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/vosimalume/song_the_road_less_traveled.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_46ae7fe455bf48e1a701ddd9f5f3ae79.pdf?index=trueIn PDF document text
    • http://sovogezo.atwebpages.com/learn_fingerstyle_guitar_book.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/kolimebuvadomewupagebud.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/9259645862.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/honda_2000_generator_oil_capacity.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_43c15b616ec84db4ba6c78f4a01b6a76.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_e3e89ac14f2d421f9c7512d9bf723c7b.pdf?index=trueIn PDF document text
    • https://4228e3e8-6e56-436b-9c2a-5710a6c3a216.filesusr.com/ugd/e32dc8_772cda8f10bf4bf7af9e0834cd3e33ae.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 5448 bytes
SHA-256: f8d94bd7f9f1f99f600072a1cd907e98c20471d7ace9534426eb2a1900778d96
font_02_sfnt_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 2644 bytes
SHA-256: ba9015971ca1b2b35be262cdef488df9ae6af7902381a406f93668c4bd731c03
font_03_sfnt_off00011f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F66 11176 bytes
SHA-256: bdde37013ce694673d87ddec54a5d26d280e4e781bb3cd5709b0e6be1c30a058
font_04_sfnt_off000145dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DC 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_05_sfnt_off00015a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A81 6356 bytes
SHA-256: 378adb24cd1ae5c25c91094e73dd072bd31d14177981bd5378807cd45a8a7290

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