Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18ebf38e116c58a…

MALICIOUS

PDF

58.9 KB Created: 2020-12-05 20:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fe870373cbf4848e1bbb57a222f184f2 SHA-1: 6419d1a55703a87cd9b3a35c09bab4b06eac4370 SHA-256: a18ebf38e116c58a12cfd44ffce36d2d16e9b49fd1118fd625efdb89db63c80d
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://traffking.ru/aws?utm_term=bow+and+arrow+games+balloons++free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is 'https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc2baf94f98375720395c56/1606597370261/49204088088.pdf'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan-like intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffking.ru/aws?utm_term=bow+and+arrow+games+balloons++free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446500/normal_5fa2628ddcda8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fc4c61395071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f92993e1850b.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/teral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f9343701f865.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/mexugep_tisumu.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/5fc10f0fab79f442f22a8155/t/5fc2baf94f98375720395c56/1606597370261/49204088088.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/rumizudabeduzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09590c76-c360-447a-afcd-dede137812b5/keep_talking_and_nobody_explodes_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9deb513d-9a7b-4ada-b796-2eae940059f8/savilujuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294dcbc0-0645-40c3-bf34-4a03beb38bc1/game_of_thrones_1_sezon_2_bolum_tr_d.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/greatest_common_factor_problems_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3f0453-781b-4781-acad-b4df45c8b87b/70693757150.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_off0000ac16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC16 5508 bytes
SHA-256: 46d27c335cf4d76246238db1c462522dbf3829a344abc53967068bbdb38d109c
font_01_sfnt_off0000becb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECB 9448 bytes
SHA-256: 1a16de53ca75bfca3a0663bfcb7e49698bffa8f3b7c60f19d6fc7e9ca57fdccd

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