Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1cfdee0aeefa6b…

MALICIOUS

PDF

88.8 KB Created: 2021-02-27 21:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ba75d8437bf23d3d0bf4a09358fb6d8c SHA-1: f4789d7ee512b7ecb101b1330778acc38340c4b7 SHA-256: eb1cfdee0aeefa6b72fa02a17fe63d2e8d87ed865f9118e6dbb5998803fd2aa5
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or redirection scheme. The presence of embedded URLs and the PDF structure itself are indicative of an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/wix?keyword=milky+chance+down+by+the+river+lyrics+song+meanings PDF link annotation
    • http://robugipunebib.mygamesonline.org/rasikugo.pdfIn PDF document text
    • http://copalofa.site/84048622583exe3c.pdfIn PDF document text
    • http://boldly-grow.com/why_does_my_oven_keep_locking744iq.pdfIn PDF document text
    • http://znakomstva18x.site/choregraphe_software_freevwold.pdfIn PDF document text
    • http://lerob.info/28347103978ql2b0.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/tom_clancy_jack_ryan_series_books.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/end_of_open_range_barbed_wire.pdfIn PDF document text
    • https://jasasexu.weebly.com/uploads/1/3/1/1/131163864/wodokadapixov.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/jekifosasiromulusitovejal.pdfIn PDF document text
    • http://virnet77.ru/daley_marsha_alone_together_lyrics0tbm6.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/a_link_to_the_past_all_items_guide.pdfIn PDF document text
    • https://bodowijesajuru.weebly.com/uploads/1/3/0/8/130873867/kowunofogo.pdfIn PDF document text
    • http://idealica-italiaofficial.site/when_is_percy_jackson_2_coming_to_disney_plus3awdc.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/english_idioms_in_use_intermediate_book_with_answers_vocabulary_reference_and_practice.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/9772424.pdfIn PDF document text
    • http://hookup666.site/e_coli_infection_treatment_in_catstp42q.pdfIn PDF document text
    • http://tramlaweq.online/98476651138cdk8c.pdfIn PDF document text
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/kigofijudejugalifu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutejaxevewef.myartsonline.com/la_la_land_city_of_stars_lyrics_youtube.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/hp_photosmart_c7280_service_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 5816 bytes
SHA-256: 628711b1705a6fdecbcb1f198bc9bbef299b01b4a13330a36d9fb725ed43cead
font_01_sfnt_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 4564 bytes
SHA-256: 364ed1ad1714ad72549b4be541a48d08954f961d261cdf751da362cc04708cab
font_02_sfnt_off00011b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1E 10724 bytes
SHA-256: b0aae5405d90f6adc7e83a1f10c1fc9a7fce442093a98bc4532ce6214b4ebbab
font_03_sfnt_off0001400a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400A 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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