Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02461871783dbb9…

MALICIOUS

PDF

75.2 KB Created: 2021-02-25 08:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea5af2efb42d58f4b99cce66fb4aa77c SHA-1: e2fe503b067dcd7f77e4d4be99f5856e1fe6e65f SHA-256: d02461871783dbb9c521e102d4932faba199eb2b312e06c9d8cfdb5f8ed3343b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/award?keyword=how+to+use+logitech+r400+laser+presentation+remote PDF link annotation
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/5290167.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/xiwofipedajulonobizyzdag.pdfIn PDF document text
    • http://cybety.xyz/soundcloud_go_apk_redditq3hkg.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/soxoxotuxoraknsew.pdfIn PDF document text
    • https://busununivid.weebly.com/uploads/1/3/4/7/134774072/fa0e8cb12d1dcba.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/peguzomalez_vabelabopun_gelazozinos_vedexejemagik.pdfIn PDF document text
    • http://omoikiri.info/basicity_of_pyridine0rn57.pdfIn PDF document text
    • http://app-3null.com/development_economics_theory_and_practice_free84f8n.pdfIn PDF document text
    • http://toportt.online/how_many_calories_are_in_a_medium_caramel_iced_coffee_from_dunkin4x6u6.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/34609828763dwf3r.pdfIn PDF document text
    • http://ca-manalapan.space/can_you_xfinity_stream_on_laptopdnvn3.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/kosiretuwosip.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/wigepalimowekon.pdfIn PDF document text
    • http://rezltml.xyz/react_boilerplate_templatejytu2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/scratch_card_cash_back_app.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_to_reset_a_droid_turbo_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/mary_oliver_bone.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 5632 bytes
SHA-256: ea8634344ff29c9cdefc4be1a48a9408db4e1575a08e118a695e98b138c6ba3f
font_01_sfnt_off0000e55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 10424 bytes
SHA-256: 43683ecdddf7da40768e59638476580b638140c1fec78968b4649eb1db9403e0
font_02_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 16384 bytes
SHA-256: 226a8e4e528c820945b068501793868e9b71e899c703a7ad804f9a2f424011a5

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