Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc62b2c75e78e10…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 21:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cb9561140a312b72f685f7cd5c958cab SHA-1: aadefdee16653e84c889c4504644d051715bec75 SHA-256: cdc62b2c75e78e103bca6ca98c51706b8ade752fbbe472907edda1dfad7b2329
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a 'Download Now' lure further supports a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=secondary+dominants+worksheet PDF link annotation
    • https://cdn.sqhk.co/kosadara/bjfiijo/r-_type_dimensions_ex_ps3.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/lowrance_elite_7_hdi_ice_transducer.pdfIn PDF document text
    • https://kisisegexorev.weebly.com/uploads/1/3/2/3/132302984/8322627.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/robin_hood_2010_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/jh9pdjh/42253400952.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/g35je4j/.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/bass_transformational_leadership_theory.pdfIn PDF document text
    • https://dawosovakix.weebly.com/uploads/1/3/6/0/136097295/5823129.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/wicY9hg/fruit_ninja_3d_apk_download.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/lusowomurumetisug.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/tafejuriv.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
    • http://winimoviwimi.myartsonline.com/celastrus_paniculatus_chemical_constituents.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_1b80f927328949b7b7bc6fa2c60e099a.pdf?index=trueIn PDF document text
    • http://vekejuf.atwebpages.com/84225013058.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/76502753222.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/90669230743.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_33c536a799b547d794cd774a7f2cdf82.pdf?index=trueIn PDF document text
    • http://milebulijulami.onlinewebshop.net/wezitikos.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_0b79481c0ca942b292b87ec55a071055.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_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 5296 bytes
SHA-256: 352ee82104d63adbcf3f850ced3229a8d2a74495c03ba0e1ccf0a7471cd43e99
font_01_sfnt_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 11508 bytes
SHA-256: 12aa4b221b0ed53d7ef305a17f7697746c60eb6655a35ddef582efaa9f77f6a3
font_02_sfnt_off000111ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AB 16120 bytes
SHA-256: 73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75
font_03_sfnt_off00012691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12691 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c