Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4babd1ac96e55c…

MALICIOUS

PDF

78.4 KB Created: 2021-05-02 08:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f872a1a5791bd01c3cc621fdd621cb6b SHA-1: d037dddbedb8b6ac158c23dffebc0f2ffaa7fc68 SHA-256: dc4babd1ac96e55c10408dbf4390c2308ec0b6aa11ef03d95f3d924cd4a0c132
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to disposable domains, many of which are part of a link farm designed to obscure the final destination. The document body, though partially corrupted, suggests a lure related to downloading Sims 3 items, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=download+sims+3+store+items+free PDF link annotation
    • http://sigisuzuk.getenjoyment.net/robada.pdfIn PDF document text
    • http://skywonder.space/medical_parasitology_questionsi743p.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/44020468934.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/gumorofitojir.pdfIn PDF document text
    • http://livemavuxedu.getenjoyment.net/51105206720.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/90227523593.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/26051712347.pdfIn PDF document text
    • http://drnextact.xyz/what_is_material_in_science_termscyk6e.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/30992991571.pdfIn PDF document text
    • http://pakaxofuj.sportsontheweb.net/management_is_doing_things_right.pdfIn PDF document text
    • http://islta.fun/h2o_mop_x5_walmart_mexicosc1s4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_e4c2127be39f418fb80a32ff26555da0.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_725e080f978a4f5e8f157bec904b1b93.pdf?index=trueIn PDF document text
    • http://weponigonimogo.myartsonline.com/asterisk_war_light_novel.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/56542376827.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/69102970474.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_do_you_charge_a_everstart_jump_starter.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_ce64818d97624fdebed562bec7cf3d4a.pdf?index=trueIn PDF document text
    • http://zejibanunepi.myartsonline.com/printable_vocabulary_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/fosakekaxebilavosutuxiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/how_to_factory_reset_hp_prime_graphing_calculator.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 5308 bytes
SHA-256: 5a4f3ef2c4d7a1c5bf531d525636c69d65bbffd811b9476e609136f88e5c9d03
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10972 bytes
SHA-256: 4b1faffbb52baf71b19ad12f9ae409d63b0502948f513e174f6d37cf00a55c5b

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