Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70f6818a0c5295b…

MALICIOUS

PDF

84.5 KB Created: 2021-02-16 14:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f370c71e2f5842208c9d3338d8995a0 SHA-1: 857d931529609b081333f1fbd59e1c17ef95ad1b SHA-256: e70f6818a0c5295b44571f02b950b89d670b8a55e78ec53a2650de2705a8ee67
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=how+high+to+mount+a+55+inch+tv+on+the+wall PDF link annotation
    • https://cdn.sqhk.co/gojelonub/4iifvgj/iptv_extreme_pro_para_pc.pdfIn PDF document text
    • http://secureappeal.com/red_button_down_dress_shirt_womenscjg1d.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/Yl5gjge/srs_topup_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/LMihjhj/animated_stickers_memes_stickers_wastickerapps._com.pdfIn PDF document text
    • http://bankrot-biznes.ru/987269184117f7m4.pdfIn PDF document text
    • http://vulifux.66ghz.com/98976761333.pdfIn PDF document text
    • http://br1.red/85756020977pyd3a.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ahgjceW/mercury_planet_pictures_real.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/58jbMKI/50892463372.pdfIn PDF document text
    • http://itayoga.space/bekhayali_mein_song_downloadkd87b.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jdhazhc/mimpi_lirik_lagu_anggun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimatun.epizy.com/59097500427.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/absent_from_work_letter_template.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/bill_of_rights_worksheet_icivics.pdfIn PDF document text
    • http://keporeninudo.rf.gd/discovering_geometry_flourish_answer_key.pdfIn PDF document text
    • http://lasikisitikuve.epizy.com/bingo_90_live_hack_android.pdfIn PDF document text
    • http://zuwapiw.rf.gd/dolby_atmos_android_app.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_off00010a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A20 5176 bytes
SHA-256: 37babc4e5dd7d01fb2d7af017fc18ee28466ee347c73f936be4f6014546cef2a
font_01_sfnt_off00011bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 11856 bytes
SHA-256: 0459148e1363655a7537ca39a3ec7385154a4bf5c87932a164c0e365b0d8c5ad

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