Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e20b1c74c4ac1c…

MALICIOUS

PDF

73.0 KB Created: 2021-01-28 23:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88a44732e0428fe8f2fe254d7ed0a567 SHA-1: 82325ad64a8e954717785c2a8edbbb397940e850 SHA-256: 19e20b1c74c4ac1cd15ef992b134590b0431656cf6cce23678d5fc8955605c18
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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jottigo.ru/wb?keyword=best%20qr%20scanner%20for%20iphone%2011 PDF link annotation
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/gegipejitunogowu.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/5Wgjaif/menagegemudaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/enMuDie/billie_eilish_bad_guy_live_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/ibThjFa/22007907603.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/hgPie1R/31765505483.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/FxUib08/pokemon_online_battle_simulator_download.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/1604708.pdfIn PDF document text
    • https://mitafewojoruwe.weebly.com/uploads/1/3/1/3/131381680/bupawibalupu_rinekodozo_piwedafigadikob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimoked.rf.gd/10329723662.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/96702222372.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/vapeza.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/48232666517.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/free_navy_dssc_past_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/xibum.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/47074380917.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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 5296 bytes
SHA-256: 2ea539861debcf8ae56f3210745e5996d831f772db79533032eed8d83d3855dc
font_01_sfnt_off0000f440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF440 10276 bytes
SHA-256: 0528a7af9e3fdc3620ef3d2fae5cc87b6e45b0ef62ee588f7b403f3233186a26

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