Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d549e3da343f33…

MALICIOUS

PDF

68.4 KB Created: 2021-03-03 05:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c1242a6a5dd33bd7312ed72ad1e985c2 SHA-1: c7764a3f588ba53088a53ec885a6a3ad39999324 SHA-256: 99d549e3da343f33ccae3df339562a75e2225b5e0c072ca8795832dfc0819ef7
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/wix?keyword=glencoe+mcgraw+hill+earth+science+worksheets+answers PDF link annotation
    • https://cdn.sqhk.co/juxerawabuf/xJ8ic7n/police_officer_pay_per_hour_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/j3haKBO/bifari.pdfIn PDF document text
    • https://tutonaxubetu.weebly.com/uploads/1/3/5/2/135296536/zatamegurudumexe.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/suzibaretu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fce8b79a8cc4.pdfIn PDF document text
    • https://marodesama.weebly.com/uploads/1/3/5/3/135349202/mipiruxanose_jejatatetevimup_lebuge.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/ce7jjie/worship_songs_mp3_download_uganda.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/dfih8VA/76722088130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_600fcc74c26b6.pdfIn PDF document text
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/4049272.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/88272851724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_600825fcc3677.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/ghiicTE/top_tags_for_likes_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_5fdaec1fef87d.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/V98hal8/17786530019.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/kozewuposoridil/82129182974.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/sasepiroxonazejasuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/bamojelibimefizitevikemit.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/casper_the_friendly_ghost_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/jetezisebikivetonamos.pdfIn PDF document text
    • http://nujugeteteda.myartsonline.com/how_long_should_you_study_for_the_teas_test.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_off0000cf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2C 5400 bytes
SHA-256: 70381a4ae9ae0fefc6ec08f24d75616c69dc3f03ffc9627c96f5eb40749757d2
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 10104 bytes
SHA-256: 353f6152ab5b7943fdd0e80f2b12064a609f337e2d37bb7d5510f1ddaa1c63fe