Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e49f169bd28eb33…

MALICIOUS

PDF

89.6 KB Created: 2020-10-28 21:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c927b1f2d2a1f78a54a3cb9ee092e020 SHA-1: 82213fdffcddc18262e1d5282e8b858bc5d35065 SHA-256: 0e49f169bd28eb3354563a3547344a7d8f7be821d771462a77423cb7deaa2411
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a McDonald's menu item and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.com/123?keyword=mcdonald%2527s+steak+egg+and+cheese+bagel+sauce In PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/xiwujabogikawi_pojepiwopiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8fe344352d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8ffc77e95b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5f972ab442813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5f98b1ccc5cf2.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/lifowulafoj_dogakijelazuge_ribixojub.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/0791639529eb41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f8c2b62063dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/81d15f5a-73a7-4e26-b419-ccb56faaab94/27114686295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09543561-1acb-476b-a578-387e408eab84/89203810955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f6d1b6-6f54-4f87-b3f6-8e4a6c25006f/xamemoxixoxivino.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tupujotofamag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f94ad1-38db-4760-a19c-d1828721ddab/zuwetapab.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/cbt_for_health_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/82383746315.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/98049917013.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/cd_action_wykop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81089f31-de52-48c5-b1c4-c16fba20c1d0/89782562877.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/thermodynamic_equation_of_state.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ee92c6-1cb4-4df4-84e3-04027071957b/47220319634.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/sorting_algorithm_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/85889014917.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 5184 bytes
SHA-256: e7dcc92f07b98b28c84207c0730df9f78ab3f9e93df38530014843bba0ac67e3
font_01_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 11044 bytes
SHA-256: a02bd39c7cdc926b04f22d1726ddafe0f2bf66154d08db195d86f8ffcff0f912
font_02_sfnt_off00014a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361