Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0920c39bb4b08b2…

MALICIOUS

PDF

80.3 KB Created: 2021-04-02 03:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d07102298b9ae23e475d3ba75440bd6 SHA-1: 1c702b6e32e38a0366e92bfc5eda150d69aaeb54 SHA-256: b0920c39bb4b08b2b5b49f278b5942d1f2e7a5a6c5604afa0f4dea19cf82645e
66 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 an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://bologen.ru/wix?keyword=physics+memes+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fe5324a41a37.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/xarik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fdad3e46498e.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/django_template_context_dictionary.pdfIn PDF document text
    • http://nuwefiles.iblogger.org/apc_smart_ups_srt_96v_3kva_battery_pack.pdfIn PDF document text
    • http://gegetibobiduvud.iblogger.org/vocabulary_learning_strategies.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/mixed_articles_exercises_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_601d9c8230986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fd6825fb4ed5.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/Hua7tgj/ps4_controller_tester_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369163/normal_6008dd04e4533.pdfIn PDF document text
    • https://cdn.sqhk.co/pilupenemima/hhjiIgc/titan_quest_anniversary_edition_cheat_engine.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/folelamakujusemijivexeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455178/normal_5fdfeff96a2cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_6014ac5d0c5e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_5fcc932709b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_60531af968a20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_657cae549f0f485e934e3ebdb3317d50.pdf?index=trueIn PDF document text
    • http://ladipuxot.rf.gd/22373732156.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/wezifomizipevetadoteja.pdfIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_b909682373f74e0ebe1a5e8a658bd7d2.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_f9ad1b7876294fef91555bda10730d9d.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 5040 bytes
SHA-256: fe5f03f9117da35c9995c3ce3017b729a3677c870ceb840bce975f0633fbb8b3
font_01_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 10476 bytes
SHA-256: 6d35718a891db47b77c6cfdebbd3c4035f38610006334b5d33f91e1a1f5bf04f

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