Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be19d5e796b7c07…

MALICIOUS

PDF

67.8 KB Created: 2021-02-20 03:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8ed386afe811a78797884781083a5345 SHA-1: bbfb7ffa26045065b92e70dbf4e57ca418285d5e SHA-256: 6be19d5e796b7c0782589cb785095713c0013244e17f744ea2b8452e377ee05d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=michael+herr+dispatches+pdf+free+download In PDF document text
    • http://nickned.me/kifabopotejefom489u.pdfIn PDF document text
    • http://regsenatvumen.website/how_to_promote_using_twitter7f1xy.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/hJxehbk/38869586402.pdfIn PDF document text
    • https://palekamenagogu.weebly.com/uploads/1/3/2/6/132682235/6404517.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/jhBPgiD/dash_till_puff_2_wiki.pdfIn PDF document text
    • http://magnitoli-2ekran.site/solar_panel_inverter_wiring_diagram1b812.pdfIn PDF document text
    • https://luwomobesu.weebly.com/uploads/1/3/4/2/134235002/fumugivuduwuz.pdfIn PDF document text
    • http://richmaya.site/angular_6_material_form_validation21gpi.pdfIn PDF document text
    • https://gukejokofa.weebly.com/uploads/1/3/0/7/130739315/b12495.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/pegek/business_english_words_with_meaning.pdfIn PDF document text
    • http://gadudadu.rf.gd/venomibanutukejosezaziwur.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/dopigimejuvegudepeneb.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/dudedov.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/assistive_touch_iphone_apk.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_off0000cbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA 5340 bytes
SHA-256: 446319fe3a7e562e7772e95c5f1878421222acb840517082ac0e01dfaecdb363
font_01_sfnt_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 10644 bytes
SHA-256: 42e31a98d4ab5afe240bf3bfda6477ae93c5adf2fa8c131388a6af4b91338eb0

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