Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74cb2c647d9f1b7…

MALICIOUS

PDF

87.9 KB Created: 2021-03-29 00:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 484c7ad5568f95df16b8a50bbbbc7707 SHA-1: 21bea81e7560fdf8e0d62b0629696fbf741bfcdd SHA-256: c74cb2c647d9f1b75d38d1879fadab4a300b93026745fa81cd2d4d48c5e8666e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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/wix?keyword=valkyrie+connect+apk+data PDF link annotation
    • https://rojabufofunos.weebly.com/uploads/1/3/0/7/130776514/6547123.pdfIn PDF document text
    • http://kvadro63.ru/advanced_structural_analysis_syllabus8rold.pdfIn PDF document text
    • http://ital-girl.space/41511654552nzo52.pdfIn PDF document text
    • http://bridgecommerce.com/rekukudagutagujcbnz9.pdfIn PDF document text
    • http://jonebosu.mywebcommunity.org/25601370374.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/ihjhsgh/43967603598.pdfIn PDF document text
    • https://lowarimubabop.weebly.com/uploads/1/3/4/7/134712264/pezarafamenudaji.pdfIn PDF document text
    • http://5coupons.info/69918919069du0xi.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/pazolevigevepopalulisuma.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/hjoggYf/sitipufixosaru.pdfIn PDF document text
    • https://vivexizakodol.weebly.com/uploads/1/3/1/4/131483194/mibuzebixodezad.pdfIn PDF document text
    • https://wixilasiniwib.weebly.com/uploads/1/3/1/1/131163505/rowul-xivuzomazodaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/0jdQifE/13351695871.pdfIn PDF document text
    • http://dekovag.mypressonline.com/89952784284.pdfIn PDF document text
    • http://banquepopulaire-fr.org/advantages_of_haptic_technologyuvocl.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/aLF3Dha/puvumo.pdfIn PDF document text
    • https://gunarolapikomi.weebly.com/uploads/1/3/4/4/134442839/7642327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risewoririti.epizy.com/2_digit_subtraction_worksheets_with_regrouping.pdfIn PDF document text
    • http://sebosolusid.rf.gd/lesiones_del_nervio_facial.pdfIn PDF document text
    • http://jujimewukekupur.epizy.com/49614356982.pdfIn PDF document text
    • http://redotikami.rf.gd/malayala_manorama_weekly.pdfIn PDF document text
    • http://wotixebapaxuwug.rf.gd/enzymatic_reaction_lab_report.pdfIn PDF document text
    • http://jeviruse.epizy.com/present_perfect_tense_exercises_perfect_english_grammar.pdfIn PDF document text
    • http://damabop.epizy.com/nokeluzokamogibi.pdfIn PDF document text
    • http://pajoxewujovero.rf.gd/suregokogusaforile.pdfIn PDF document text
    • http://dojopugoput.epizy.com/akira_full_movie_2016.pdfIn PDF document text
    • http://lexekuduwowig.atwebpages.com/human_psychology_malayalam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001044d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 5020 bytes
SHA-256: 0d8c9bd30a2f951d3590b7f65c5453581f6be4ea0fc032012a46cb37a3710178
font_01_sfnt_off0001157d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157D 11868 bytes
SHA-256: 13b8d8cf0da40c586ee4bc14bf14b00073ed11b04cc24b785d755c1ee0f00e8f
font_02_sfnt_off00013ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CED 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848