Malicious PDF — malware analysis report

Static analysis result for SHA-256 9431464f70fefbe1…

MALICIOUS

PDF

80.1 KB Created: 2021-02-19 19:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 29df1023db43988e49ad8b01004329f4 SHA-1: 55724b12b5f1de95728b421397a39ddfd5836400 SHA-256: 9431464f70fefbe19de06d99ff511990fbd09b7a4c34ab89b731d994cc203a05
254 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
  • 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://yafferge.ru/aws?utm_term=manual+notebook+hp+elitebook+6930p+price+in+pakistan In PDF document text
    • http://jujojewufi.iblogger.org/vajikelen.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/2141261.pdfIn PDF document text
    • http://mediaverifiedbadge.com/27095379950rt5m9.pdfIn PDF document text
    • http://christmas-gift.ru/thematic_data_analysissmdxa.pdfIn PDF document text
    • http://faceit.su/camera_360_lite_androidrts6c.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/dojonuta/busoroxaraza.pdfIn PDF document text
    • http://laxowukuwex.epizy.com/toddler_bed_sheet_set_100_cotton.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/transformacion_isometrica_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/kigolijemigufirepuvuxilo.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/yahoo_chat_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/alv_drill_down_report_in_sap_abap.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/choux_pastry_swan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/kezevipubof.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/best_insect_guide_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/information_about_planets_in_english.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_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5844 bytes
SHA-256: 2c07e420b6af3fd9cc7a52b520e64e1ef7adb1084b394858bb53ace737b2d0fe
font_01_sfnt_off000109f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F4 13144 bytes
SHA-256: 4c8a5b2d1967e7a430b3115d3f4eff07ce4e0c6e8ae0b1390a948c43578611e3