Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b506843b45555ae…

MALICIOUS

PDF

72.0 KB Created: 2021-02-17 01:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 370b66fd0a586c841d1ccdd2a8a3fb44 SHA-1: a6c606e2a81a5ec4cbcac05a26156a9aebac0c9f SHA-256: 7b506843b45555ae7dd65e62ee9a5b997ceb20749b16ebd82c0990bf9eebd243
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://jottigo.ru/wix?keyword=toastmasters+cc+manual+speech+10 PDF link annotation
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/870a6f659056443.pdfIn PDF document text
    • http://temilops.xyz/57470699470g7goq.pdfIn PDF document text
    • http://azules.ru/rezuwafetapoxutusigexarenrx8ns.pdfIn PDF document text
    • https://bazodezivif.weebly.com/uploads/1/3/6/0/136088162/6006076.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/jevurabiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_6021f9c1a1240.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/rivazixexuguri/15503729886.pdfIn PDF document text
    • http://dejotiwamur.epizy.com/aplicativo_netflix_para_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/13123171107.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/chicken_fajitas_oven_sheet_pan.pdfIn PDF document text
    • http://pekagotikoweguf.epizy.com/clash_royale_pc_no_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/keno_je_toke_bengali_song_lyrics.pdfIn PDF document text
    • http://nonibil.epizy.com/android_studio_project_api_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/windows_10_version_1803_issues.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/jotupo.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/nurox.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_off0000de10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 5316 bytes
SHA-256: 9dae4f3446111379d941e8a4eb5d8e0768337938472f6b83cfbec38bdc0619e9
font_01_sfnt_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 10256 bytes
SHA-256: 12018ece4a13680fab545b1fe19cbe682c0bd82c7c4371c961777d148371964c