Malicious PDF — malware analysis report

Static analysis result for SHA-256 540d3a7ad0a2c55b…

MALICIOUS

PDF

95.7 KB Created: 2021-03-08 20:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3b19c3f070bf0cb7885e16a3871b7e22 SHA-1: d134fb73f8bfcb7b9d9ce3a26fb80e2e95abab56 SHA-256: 540d3a7ad0a2c55bf2d675344e7ef2145b098461ec8e9362fe5c53ce16137690
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 trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to hurricane tracking charts, likely to deceive users into clicking malicious links.

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://bologen.ru/award?keyword=atlantic+hurricane+tracking+chart+pdf PDF link annotation
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/vagirober.pdfIn PDF document text
    • https://zedunuburow.weebly.com/uploads/1/3/4/0/134042823/013ceea77e1e6ce.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/cRzhaHM/switch_lite_case_clear.pdfIn PDF document text
    • http://dvigatel.guru/rixibatapk2j7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_602b4881b767f.pdfIn PDF document text
    • http://timujegewaverun.22web.org/sireginakaxododedidef.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/speakeasy_tattoo_los_angeles_location.pdfIn PDF document text
    • http://bluebadgeform.com/bakuzazudewenomikofere9topf.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/bCidLby/lunuvojomutatejopeguwoda.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/what_is_ethical_modeling_by_a_public_manager.pdfIn PDF document text
    • http://vipmanmarket.space/table_centerpieces_for_new_years_evegqjk4.pdfIn PDF document text
    • http://weraka.online/free_music_country_songs_2020_southm1i7x.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/nigazupulep.pdfIn PDF document text
    • http://1s.london/pujuzovuzumia5qy6.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/kugalifupawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5fe504bf4b975.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/4707112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jasudewibolix.rf.gd/armored_titan_and_colossal_titan_transformation.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/list_of_regular_verbs_in_english_with_spanish_translation.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/64227322402.pdfIn PDF document text
    • http://xitiwefebulu.rf.gd/ginnie_mae_short_sale_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 5064 bytes
SHA-256: 7f4f37d735ba847840efde47bd7859c54abeb78c2c465c1e52aaa72ac939c902
font_01_sfnt_off00014001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14001 10360 bytes
SHA-256: 97a933178e6c32944cd6ad4682cd86394cb496ff0fbc98c523f651f6664c9a87
font_02_sfnt_off0001633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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