Malicious PDF — malware analysis report

Static analysis result for SHA-256 238adb9e6369fce3…

MALICIOUS

PDF

67.1 KB Created: 2021-02-09 10:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 42d4391612ddef512a27b883df2000c9 SHA-1: f714231e532e823d36e20a5de603ee2aa86290cc SHA-256: 238adb9e6369fce32b3825e17db6080d147caa8d3c64613cdbde09b411862bc3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/shook?utm_term=moto+tuning+game In PDF document text
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/vijidodesepi.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/RjdGihF/64483732463.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/a3haYja/hashtags_best_tags_for_likes_followers_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_601b8cbd7dcb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458616/normal_5fe8c86565008.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/mhhBChj/59729647471.pdfIn PDF document text
    • http://italiabeach.space/bofemvdmo9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455376/normal_6004fbb3a005b.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/bowewusotiliful-jojafirep-najasogetodeta-lesevubojot.pdfIn PDF document text
    • http://komarovskii.xyz/4761994859707mnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6015ab8d1a131.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/gfjchfL/tefukameniladopag.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/jhhdBip/flex_fuel_service_stations_near_me.pdfIn PDF document text
    • http://best-ital.fun/48085261559g7ez7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigirulame.epizy.com/bhai_tera_happy_birthday_song_ringtone.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_off0000cb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2B 4704 bytes
SHA-256: 5632478e5d103524389bd9585824d595d3fbcb82e4499255570c1ddea3b7e844
font_01_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 10816 bytes
SHA-256: 0365e7d3d8b4c033192c8c16d420c5ff7478b18b336819743a87ec12ce318c22

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