Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebc748c8edc0ee0…

MALICIOUS

PDF

155.7 KB Created: 2021-05-28 03:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 219471a45142786342a6562b872a1b95 SHA-1: 8c34c00358114ddd2010e42ad899b28aa70a04ed SHA-256: 6ebc748c8edc0ee0556770c049206f903b7fee494702989eead9e6b6b1bf32c8
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 0.9924

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=oxford+picture+dictionary+third+edition+english+arabic+pdf+download PDF link annotation
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/lezutewolij-xibida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_60556b1d413f0.pdfIn PDF document text
    • https://felepakupanemof.weebly.com/uploads/1/3/4/4/134473623/95ffba40c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5fef5e5f3bd75.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/wiwaje.pdfIn PDF document text
    • https://lapadodipelij.weebly.com/uploads/1/3/1/1/131164402/bisarodejajemiw_lajujij_vikozuparomug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409403/normal_5ff14a8a9e9a6.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/lusabofosanov-xamugulasemir.pdfIn PDF document text
    • https://sedapelagug.weebly.com/uploads/1/3/4/1/134109100/zujalawomas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_602b7532b42dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501514/normal_5fcb70d3e29d9.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/ferupifatafi-jidanamozaweko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_60475474375d0.pdfIn PDF document text
    • https://wemedasexokava.weebly.com/uploads/1/3/4/5/134512162/97d165.pdfIn PDF document text
    • https://bigubiforuse.weebly.com/uploads/1/3/5/3/135389938/720f24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ecf7edb-7266-4cbc-90b0-2a7e3d4dda84/garmin_nuvi_3597lm_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85db8f06-9f45-41ac-b287-30b410dc40b5/penndot_rc_standards_inlets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca770cd8-c6a8-47e3-b5e9-f268ed71a58a/how_to_register_nri_marriage_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868ee2f1-be91-4c5f-ac05-2c7cb7e9e26c/dnd_dice_mould.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15aac410-0b4f-40f0-8c9c-462a8688d761/virgil_aeneid_book_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd78abc0-613d-464e-aacd-0fa6b1afd9df/pidowagus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69b16f7-3425-437c-b285-3d3b67d2041e/craftsman_21_179cc_4-cycle_snowblower_manual.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
    • 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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00021150.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21150 31696 bytes
SHA-256: 3a7ea5b7d50b4b072e6d59d2a121ce00b0d5c7b05c237919b39ed18c47f9d02d
font_00_sfnt_off0001642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642A 19380 bytes
SHA-256: cce21ed4f851ea54c5bfbe5f850fb1b7743dc4f84132613e01599164409b62f7
font_01_sfnt_off00019768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19768 5808 bytes
SHA-256: 340756a23924ba01035e167adcef977efdd03ed13de3f586a91951a5c9c4afae
font_02_sfnt_off0001ab7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB7D 5848 bytes
SHA-256: cd2b1f18467f720b76eb2b132c5f968030a334cf2a3b7cc8a68d93ae25f55233
font_03_sfnt_off0001bf6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF6D 11456 bytes
SHA-256: 82494c2d889211a216580ff61f01c84bf2a116e50a9a2b14b9974a93c306b304
font_04_sfnt_off0001dfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFDD 15448 bytes
SHA-256: b9b9980edc30ed8da55c58d86b765dc9e318515f0bc340eb660dd64616c7a67a
font_06_sfnt_off000249f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249F6 6132 bytes
SHA-256: 7425083da3a69509bfb5fd049948c916f75a3542a00f1d94acf937324596b96c

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