Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71e9b4ddc009c9e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-29 03:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9abb97da79cd6981c77b6cede0b5e286 SHA-1: cb7296b991b2a2ebc35822dc3212094acb982d84 SHA-256: e71e9b4ddc009c9eba262207833ea59e91ab3debf2221b1eff6e4e577e178a3b
134 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing. The document body, though heavily obfuscated, contains phrases related to free downloads, reinforcing the lure. The presence of external URIs and the link farm structure points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=writing+the+breakout+novel+pdf+free+download PDF link annotation
    • http://finuxezanasa.mygamesonline.org/how_do_you_cook_with_air_fryer.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/99057630132.pdfIn PDF document text
    • http://reawont.online/zevagujevuxokill7qqx.pdfIn PDF document text
    • http://noverst.xyz/jlab_air_true_wireless_earbuds_manualopoup.pdfIn PDF document text
    • http://uptodate.site/16725687533piilb.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/paradise_lost_book_4_text.pdfIn PDF document text
    • http://wodaserurefuw.iblogger.org/81436077325.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/6450954102.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/welemilidijizavab.pdfIn PDF document text
    • http://modarab.mygamesonline.org/75081571219.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/alligation_and_mixture_tricks.pdfIn PDF document text
    • http://natosabi.mygamesonline.org/67115494049.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/ihAGKii/zombicide_night_of_the_living_dead_rules.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/calicut_university_bsc_maths_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/jcC7jbQ/misebusivebufizuwu.pdfIn PDF document text
    • http://gevixadita.22web.org/55399126737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuremekewema.rf.gd/song_of_solomon_chapter_2_verse_3_meaning.pdfIn PDF document text
    • http://jojofolarimema.epizy.com/drunvalo_melchizedek_2020_corona.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_e2e3177edf5c438fb3f3be4f031bdfeb.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_a3563873180c48abb1ea7c4086ffabb9.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_464d3885bb37432c8c51c0c5d31a86d9.pdf?index=trueIn 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_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5496 bytes
SHA-256: af613083c575d98a3dec3207c8fe9a81252aa0bf25033885312276c0b92f0576
font_01_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 11552 bytes
SHA-256: 24f1d5e8c0bcaee81c8dbe1121fe62559b8216b115285c158c8690543b02b1f9

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