Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6944d50ab012d4…

MALICIOUS

PDF

89.4 KB Created: 2021-04-08 07:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 715e44723c6b8faa3ec77fdb70f5b8a0 SHA-1: d4ec30f1ddc236356cbda7b7d0fe6cd85e62dbdb SHA-256: 9e6944d50ab012d442a5f8424b717a1bf71e8e2d8f8493aa577909ce3f57d650
134 Risk Score

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 0.9992

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://botokaw.ru/123?utm_term=adm+pro+latest+version+apk+free PDF link annotation
    • https://cdn.sqhk.co/bubiwalifeda/mW9ibhh/figevud.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/cRw0ihB/gitagorow.pdfIn PDF document text
    • http://zedanipon.iblogger.org/neviwatejuwelapakagog.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/classicismo_musica.pdfIn PDF document text
    • http://jidonuse.iblogger.org/35526570296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_6061f3e42b8bd.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/jfQt22E/51330564616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_600db7b27a357.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/jficTNc/best_3_point_shooters_in_the_nba.pdfIn PDF document text
    • https://cdn.sqhk.co/nikapeke/jevgfji/extreme_car_racing_download_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc4d493-37ee-4537-803f-fd7f42a14c27/how_much_potassium_do_sweet_potatoes_have.pdfIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_f82563021a264668aaed4289cb52e456.pdf?index=trueIn PDF document text
    • http://kiguwodakoz.rf.gd/advanced_english_speaking_book.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/bluebeam_revu_full_version_free_download.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_77ab227014f34ad0ab01fa30065713cc.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_f0a137081f304fc8a7c9fe5835c7a346.pdf?index=trueIn PDF document text
    • http://gugogedufos.epizy.com/86921421831.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_7edfe8641f6c4790bd8423ec3d8ab072.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67f9891-0e9f-48ec-a39b-c319901d916d/zazudeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004d9c95-87b3-48c3-b93d-76d61da75697/77508242112.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_64847ff67928481da175d710f5eb7d66.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001019f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019F 5300 bytes
SHA-256: e48264e190a09f123820458821d6329985184d948d0631fa547af93f49d9fda1
font_01_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 11036 bytes
SHA-256: 20d0c55aca9f686e49b2d5e71fd859cf5c46a0c06c21d33a8a9f3a6956693833
font_03_sfnt_off00014231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14231 16080 bytes
SHA-256: 8c057ff56373bbf45afdd23f1044ce12c5a9a8acf3353b47e648605ecd89557f