Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5d6ba9a434e086…

MALICIOUS

PDF

84.0 KB Created: 2021-03-10 07:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc365b53fcebaa9a6da8b9861c6227df SHA-1: e5a5fbdd1c7bd47a15cbda5a977afee253ee8178 SHA-256: df5d6ba9a434e086de8af5d649390c2a9d5bffa20beb27b3959f1e207ba7d3bc
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a notable concentration on disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a reference to 'how did jodi arias kill travis alexander', which is likely a lure to attract victims to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=how+did+jodi+arias+kill+travis+alexander PDF link annotation
    • http://gayerkan.com/52846046068kaxaq.pdfIn PDF document text
    • http://legendbilisim.com/knysna_forest_guided_toursgvfk1.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/53076787963.pdfIn PDF document text
    • http://febisulel.22web.org/what_games_to_play_with_girlfriend.pdfIn PDF document text
    • http://steelsho3.club/baixar_atube_catcher_atualizadopl766.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/729168813123tl0d.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/rukedabusap.pdfIn PDF document text
    • http://donbetosstreettacos.com/47402293090itkpa.pdfIn PDF document text
    • http://gudoteli.22web.org/self-reliance_summary_ppt.pdfIn PDF document text
    • http://freshmind.net/story_map_ks2_templatewmpok.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/monster_in_law_full_movie_free_123movies.pdfIn PDF document text
    • http://ayazshabutdinov.club/31783011680zhpg0.pdfIn PDF document text
    • http://bella24.xyz/tojiruwezekepazuza0lmx9.pdfIn PDF document text
    • http://copyrightreports.com/gowivuxolewabupewirob8gshj.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/natewared/fidelity_international_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/net_framework_windows_10_offline_installer.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_d6bedf5bc7f04a9caccb5c19701bd848.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/what_is_a_good_faith_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/information_and_broadcasting_ministry_gujarat.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_d45607cf223d4704b62de6b39f4fc7cf.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_188ed900a1934f0687769ce05d4a1d14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/divizenepisidazavu.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_c5f431a6ccec4ab4bade2459a33e6581.pdf?index=trueIn PDF document text
    • http://faruvesisok.rf.gd/bathukamma_songs_telugu_lo_ing.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_off00010d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 5140 bytes
SHA-256: 545e949bd4077c8dae8840debb02cc8a544a6267fd602a0a4331ec5100b9397e
font_01_sfnt_off00011f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F40 10112 bytes
SHA-256: e9a8eac1e4844b88df2656eed0fd9cd11d007c3dd0ee1a5aea5318e255238aff

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