Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffeed81d77dd864…

MALICIOUS

PDF

66.5 KB Created: 2020-12-02 16:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c11d30b50d6b588597274d7bd3b32d40 SHA-1: e34dc8ae53b1c95e428f1a04db909bcc740f7c33 SHA-256: 2ffeed81d77dd8641ec0aa44927bca5f2396de52b9b5c439223d1e6fd5c94b53
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://traffnew.ru/aws. This suggests an attempt to direct users to a potentially harmful site. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=android+games+like+summertime+saga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5f9a9f4b92254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5fa50656e4850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5fc0c17fc57a9.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/guxujusimoxap.pdfIn PDF document text
    • https://nonudefetug.weebly.com/uploads/1/3/4/3/134314303/7317763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0abc6bda9c57a97bd16fd/t/5fc158777acac6192af2fc63/1606506616765/waste_equals_food_system.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53a0ec89e1c4b8fdafd1e/t/5fc746799dfc2a40451cb533/1606895228878/deciduous_forest_survival_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4988fe10e847afc0398a/1606240650074/minnie_mouse_bow_outline_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de1b7848ba205d3add58/t/5fc6b0049b1ed03538cb36d0/1606856709902/pitekagatodobasipuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73c3854-143a-4b78-8fc5-caee7042f809/50041567627.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb79e5c7695ca99bb922/t/5fc0f8073c02f22b9d2ff4c0/1606481930267/7_years_old_song_1_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37908f90-038c-434e-8e07-785888f9e9a5/milwaukee_sawzall_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/ap_world_history_unit_6_study_guide.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_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 5200 bytes
SHA-256: 65370c39bd6cc5d8cb16ef3f9e3dece159c17c5557bc4de2e25ac41e530a5bce
font_01_sfnt_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 10408 bytes
SHA-256: f7328e2bc4594d6cf66c96a9c4436b53378e522a5f983b9ee3a702c46038b798

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