Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b23ba4724610a91…

MALICIOUS

PDF

39.2 KB Created: 2020-11-02 15:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 508fe65395ead28ea93789bd950d3276 SHA-1: 8b92bf1a074f85c0ca09121ae14a66171d18048e SHA-256: 0b23ba4724610a914ca7c3dcec50c4425f4b7316bdac24ece62f8749571d90e3
170 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to 'https://cctraff.ru/aws?keyword=msn+member+center+install', identified as a malicious redirector. The document body also contains text related to 'msn member center install' and a call-to-action, suggesting a phishing or credential harvesting attempt. The presence of numerous external PDF links, many pointing to benign content, indicates a potential link farm used to obscure the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/aws?keyword=msn+member+center+install In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5f9ff556bbb95.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/zetituri/successful_socialist_countries_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/calendario_completo_serie_a_19_20.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/water_pollution_information_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9e685e-9c78-484e-b970-1c7554aa672e/74633812365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8570/4615/files/lego_mars_mission_crystalien_conflict_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3509027-0626-4974-9105-deee8f6dec9d/71172133882.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/86042163534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8d0e09-a1a4-492a-ac2f-416689b62590/night_pleasures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990a9b8c-565a-46d5-b5c9-cf50542744d1/32723222930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4756/5512/files/82166181258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f062ac0-6167-4eb6-b083-6370f1d87659/26256599710.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/wedubulamubebaparag.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_off00005aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA3 5088 bytes
SHA-256: 94335ba04de639f3f5beab8cd946bf9fa2de3887a7114b1f605e6ca6cac8e9b7
font_01_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 10656 bytes
SHA-256: 3e5321b96055d5fc4dfa8287d55a9e7d372591d5aec2649e14b4c59218716eb4

Open this report in the interactive analyzer, or submit your own file for analysis.