Malicious PDF — malware analysis report

Static analysis result for SHA-256 901af76d71934bcb…

MALICIOUS

PDF

86.4 KB Created: 2021-03-23 00:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3e43170bce2b3a1633e1241427ffda11 SHA-1: e0e865847b9f47018a3e73dc6ab3212bf735b936 SHA-256: 901af76d71934bcbc14e627d2a45f6aa5d6dddee917c301e4b933382bc0528f1
66 Risk Score

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 0.9990

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://resalured.ru/123?utm_term=update+facebook+latest+version+for+android PDF link annotation
    • http://kodavuviguwu.mypressonline.com/7739058379.pdfIn PDF document text
    • http://liketsven.xyz/inteligencia_emocional_daniel_goleman_resumenelv5p.pdfIn PDF document text
    • https://cdn.sqhk.co/meparifemoji/g3jsQNv/37158207460.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/ejdsZji/lesson_plan_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/dCib9gi/navy_seal_shark_attack_sydney_harbour.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/gjmKg88/cake_baking_school_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/anthem_by_ayn_rand_free.pdfIn PDF document text
    • https://kunamugak.weebly.com/uploads/1/3/0/7/130739026/jitufapezexax.pdfIn PDF document text
    • http://tazasimeli.22web.org/gta_san_andreas_cheat_codes_pc_english.pdfIn PDF document text
    • http://national-verifyteam.com/spider_frog_song08b5d.pdfIn PDF document text
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/xazexi_bipexewuzuvuze_vobigixeme_betarevozoruv.pdfIn PDF document text
    • http://tikovg.xyz/fenafomorifuzawenowefixu20cel.pdfIn PDF document text
    • http://testvvd.xyz/789115487665lc1r.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/ditepedaxavu-nanufinexumoto-gekesut.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/senodiw/52942529271.pdfIn PDF document text
    • http://berojopuzenon.rf.gd/university_of_cambridge_map.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/sovazorujerebonot.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/us_citizenship_test_questions_and_answers_cd.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/degozarubeb.pdfIn PDF document text
    • http://wadobenozunon.rf.gd/oil_coming_out_of_carburetor_harley.pdfIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/1501502319.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/80497873886.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/aplicativo_netflix_para_android_tv.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000fe34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE34 13816 bytes
SHA-256: cc20ab6040d4f0ddbe9a2c17812ca30571fb91f41a098b3bd24181ae86f1a7a9
font_00_sfnt_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5404 bytes
SHA-256: 324abf93feb014f22480671b0f9f0933733eac85751a9d70ee43a9b6fc382407
font_02_sfnt_off000124ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 10884 bytes
SHA-256: 00145c0bddedd78a1b4684c8dda3957970bbd1b47c946933dc23bb122e33319e

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