Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28e9b087c9b073e…

MALICIOUS

PDF

75.9 KB Created: 2021-01-29 21:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e67dfa651c6b3e20037d4341ca4b1795 SHA-1: a3d15024df36ec5a0e30b73a28369f940aaa5174 SHA-256: e28e9b087c9b073e85786c0fa9efc01e645051f649f6984481b529b47562dd28
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://bologen.ru/wb?keyword=running%20princess%20game%20download%209app PDF link annotation
    • http://dreamingdeveloper.com/mekuzedegipamapum1crzq.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/tngiicr/mobile_phone_locator_app_download.pdfIn PDF document text
    • http://lolkek.xyz/menojamomeuub.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/bacff2afe.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/iLggggu/zudugitur.pdfIn PDF document text
    • https://cdn.sqhk.co/zonigita/jggdFJB/yahtzee_with_buddies_dice_game.pdfIn PDF document text
    • https://jenodavosu.weebly.com/uploads/1/3/0/7/130775827/7707385.pdfIn PDF document text
    • http://hydrofthol.space/ginufaretatabatirotafozee5lj5.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/lezukisopibin.pdfIn PDF document text
    • http://ultra0.space/gozivegqc2g.pdfIn PDF document text
    • https://cdn.sqhk.co/piwewupovo/TLiimzL/53718855949.pdfIn PDF document text
    • http://repair-monokoles.ru/fukulesozasawanu5ngya.pdfIn PDF document text
    • http://podeves.xyz/original_hokey_pokey_song_lyricsnuy00.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/xufujofaleki/53419137914.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/46789699668.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/95447320359.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/duzisuvetidurizudawe.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/81141322638.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 5648 bytes
SHA-256: 35c87f9d2454937c0444f2b41cfe5f233162a4a0fbdfbc8711dc2089f077213d
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 10644 bytes
SHA-256: 29af161164c346d1d060a0309ebb7facfa786affb09a250b68efb756bb8f6c38

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