Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e904c868a10ee50…

MALICIOUS

PDF

77.7 KB Created: 2021-04-12 05:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1084897e1fb5487459fec1d13fca5abc SHA-1: ed6d83f35a89680bdc93f06de8de32c2308f32f6 SHA-256: 1e904c868a10ee5060d9a5914e3068751d8db9d2dae47850b5f932634a2cfe12
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to disassembling elliptical machines, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=how+to+disassemble+sole+e35+elliptical PDF link annotation
    • http://pixujuxe.mypressonline.com/difference_between_algae_and_fungi.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/eibjjcC/zovogipo.pdfIn PDF document text
    • http://lagidonak.mygamesonline.org/wisudoj.pdfIn PDF document text
    • http://demigatakubap.iblogger.org/rapupaxebig.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/BQ3jj4M/94321661917.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/98WKzS4/tezotezexiz.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/38597772560.pdfIn PDF document text
    • http://samewejasaka.iblogger.org/legal_argumentation_and_evidence.pdfIn PDF document text
    • http://lulodexov.scienceontheweb.net/william_marrion_branham_message_books.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/hfl4hhZ/54638456897.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/69932442690.pdfIn PDF document text
    • http://xakojudanek.66ghz.com/20809482160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupefavasareje.rf.gd/new_code_of_judicial_conduct.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/fazodekikasalefepefeb.pdfIn PDF document text
    • http://suwutosu.epizy.com/tent_card_template_word_avery.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_740d413bdb214fe0a174636a58f563c7.pdf?index=trueIn PDF document text
    • http://zesinav.rf.gd/ponavaf.pdfIn PDF document text
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_4121248a9c3e4a668b2aca34add4a1ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugafebip/360_antivirus_software_free_for_pc.pdfIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_86c7f4cefcc9486cb7dfefdd7bc126d1.pdf?index=trueIn PDF document text
    • http://vukimikopid.epizy.com/51496868197.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/75870083701.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_c3f1ccd6729c4382b767479347ec9bfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/how_to_write_a_summary_statement_for_resume.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/online_admission_form_for_degree_college.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_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 5604 bytes
SHA-256: 7602188a431d0bc41a6d25118a6600acd8e852385e507827d98426bcfe2e78de
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 11400 bytes
SHA-256: b2cef7fbf79c4ea69afc371535528f07d3b95ecb2b2055d1e0cf197dbb5f2f97

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