Malicious PDF — malware analysis report

Static analysis result for SHA-256 393563946dc1c153…

MALICIOUS

PDF

70.2 KB Created: 2021-02-23 07:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 013cd2090e77eea2fb846182c8d30061 SHA-1: 5cced846ed04abc19ba7874bb2b8d4dbdbbb40e2 SHA-256: 393563946dc1c153318d120b6083006cc4dd98d8b5d4cedb60c64c767a7e7cda
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=campbell+hausfeld+airless+paint+sprayer+manual In PDF document text
    • https://tivubolo.weebly.com/uploads/1/3/1/8/131857038/beded-xuxoripagopo-tenabe.pdfIn PDF document text
    • http://natur-bio.space/32962473047bbm8r.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/6763315.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/86233443461.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/4593968.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/gonafoziguwewe/67874667560.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/pc_brightness_control_software.pdfIn PDF document text
    • http://tevisub.rf.gd/dd_5e_character_sheet_fillable_online.pdfIn PDF document text
    • http://xofiketur.rf.gd/ikea_bedding_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/54356894055.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/porigi.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/android_kotlin_google_maps_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/67150695386.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_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 5428 bytes
SHA-256: 4e7a3b89fda2f15900eb191bca4a0b19b5ce3e3531552367ef0f54b942dadac7
font_01_sfnt_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 10520 bytes
SHA-256: 6462bad4b728849fd87fe3139e09b57f1f4473eb734c3f50e63f6580d35fa830