Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aa7e4ef9885fec…

MALICIOUS

PDF

78.8 KB Created: 2021-02-14 13:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c9347b096236a92a50ea4dcb4246255 SHA-1: 116143fe73a74c59584f8d6114e7c8993226d514 SHA-256: 30aa7e4ef9885fec910ea38d336beb43d43a730761eafa67b3026f02c859f58b
184 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely serves as a lure to download further malicious content or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=ant%20er%20for%20chrome%20windows%207 In PDF document text
    • http://erogan24.website/finding_the_nth_term_of_an_arithmetic_sequence_quizz8s8p.pdfIn PDF document text
    • http://glawerry.online/chess_master_gameboy1l81d.pdfIn PDF document text
    • http://gazzsheff.xyz/7589464856777k2m.pdfIn PDF document text
    • http://scoretdho.best/4136733571mux9b.pdfIn PDF document text
    • http://hookup153.fun/40604130109383mm.pdfIn PDF document text
    • http://chambrehub.xyz/minajigob8x0ep.pdfIn PDF document text
    • http://axacheat4.xyz/99535474350h3tz2.pdfIn PDF document text
    • http://limowoduramu.iblogger.org/resalurodotakudisawonimu.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/febopa/bleacher_report_ncaa_football_week_3.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/bollywood_punjabi_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/avery_index_card_template_word.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/chrome_apk_for_jio_phone.pdfIn PDF document text
    • http://wodasakuzetu.rf.gd/basadebifaxaduforebituvi.pdfIn PDF document text
    • http://xugomoxuniwemo.rf.gd/mepubexerilugiziz.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/gojizab.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_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 5180 bytes
SHA-256: 2471d442041db3809214192c56faae7add3672521edb29db66ad73c2635137bc
font_01_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 11340 bytes
SHA-256: b19fa285cf661d3f626589e369fa60e1f93252d15c9805c7cb351ffb3580bf97

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