Malicious PDF — malware analysis report

Static analysis result for SHA-256 309942ae27956b90…

MALICIOUS

PDF

64.3 KB Created: 2020-12-22 19:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4ea1268326fe57a9911cc1ae80951895 SHA-1: 044c730440877b934c053be3560530e5e50cd9e0 SHA-256: 309942ae27956b902950c5140ae7145ed36ce229b2584e8745e83878cb2605f7
204 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, using a movie title as bait to entice users. It contains numerous external links, many of which point to SEO redirectors designed to obscure the final destination. The presence of a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=bareilly+ki+barfi+movie++hd+worldfree4u PDF link annotation
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bavamokexupujif.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/5997773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d919b8b-8701-4522-8994-cf822f9ac87c/kunegobevekadav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3c4ed7-e129-4753-8489-261e58dc6647/25146342544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854ccece-c824-446a-b111-3fc72b5e6c26/wicor_strategies.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce37932ebf7d3ac6444665/t/5fd710b5102ca46975fb1bcd/1607930037927/computer_ki_full_form_ka_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb86cbe-1464-48fb-b674-dcd2ebc65fec/ravopajopivijoda.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/hepatitis_b_testing_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe19c8a76de9d7d8ec643df/t/5fe1a4f425b65769547e1f28/1608623349197/bomb_it_7_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ae458b9e860b7b227cd3/t/5fd1bd481693665fc7d10a2b/1607581000966/dowapomikimukujazelusos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c661a207-4878-4855-8629-622503ab26b4/gesejalotonajasisokog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc390e0f9866f3fd2e4e56d/t/5fc6c5cf7995075abdcdb523/1606862288336/double_arrow_pointing_up_symbol.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_off0000bcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAA 5564 bytes
SHA-256: d9763e38dfb6d1620b038869af3c432e2ae608933929a0998934e1260fafbb8d
font_01_sfnt_off0000cf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 10972 bytes
SHA-256: 12695c3abcd6a4caeb88a9a11e5ec461786b85e24a744819515e5fc987edd1a6