Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b1e13d9e748156…

MALICIOUS

PDF

71.7 KB Created: 2021-02-21 07:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 053db1b1f3ab6c5afc446e6781935b1b SHA-1: 16ed7181dfb79de886656e6a57abc6bf109cfa06 SHA-256: a0b1e13d9e748156d72a3e4baca65e1969e5c1d122397406647140b705b4e0b6
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=diono+rainier+2axt+manual In PDF document text
    • http://piredvizhnik.com/bow_tie_pasta_with_spinach_and_cherry_tomatoes2oxmz.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/fuwenuverel-fewenejomu-fidubixi-sanadijex.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/4081753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_602e74fc35b86.pdfIn PDF document text
    • http://6gusevshop.website/messenger_app_problemskjzdw.pdfIn PDF document text
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/8393f.pdfIn PDF document text
    • http://kosufezegaxid.iblogger.org/add_c_templates_to_visual_studio.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/fejififimaketo/41080906555.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/59590387830.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/schlage_handpunch_3000_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/morbidity_and_mortality_rounds_template.pdfIn PDF document text
    • http://lagarudu.epizy.com/espn_sports_reporters_female.pdfIn PDF document text
    • http://kowogipat.epizy.com/tigatumelokisuseze.pdfIn PDF document text
    • http://bovubodomumid.epizy.com/52148588043.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_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 4852 bytes
SHA-256: 488ccb2ddd6b6c810a210ad18b69adad67da1da4b46f34afd1dcc2264a7adfb2
font_01_sfnt_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 10744 bytes
SHA-256: 6e06042518e4b5e0a901eefdebff5e1332496b67fa71d9cc07f0d2eeb2764e18

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