Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc649101a185973c…

MALICIOUS

PDF

63.2 KB Created: 2021-01-12 15:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7f9b78e9450ac4512142a0a90f07a9e0 SHA-1: 74a85c59e0224102e8aabce1a386dc0ee89e116e SHA-256: cc649101a185973c2ea3f9d9b79235934d1ef5fa33448184c466a66469fb0587
164 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm (PDF_SEO_LINK_FARM) with 30 external links, suggesting an attempt to distribute multiple files. One of the primary external URIs points to a domain associated with malicious activity. The ML classifier also flagged this PDF as malicious with a high confidence score. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafffe.ru/aws?utm_term=ambledown+claim+form+2019 PDF link annotation
    • https://site-1171953.mozfiles.com/files/1171953/download_lab_escape_mod_apk_android_1_2018.pdfIn PDF document text
    • https://lirutuve.weebly.com/uploads/1/3/4/4/134462413/sunud-tozazeneja-tokiga-givowigul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fd1997511778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388162/normal_5ff1620e4d15f.pdfIn PDF document text
    • https://site-1179698.mozfiles.com/files/1179698/28572432576.pdfIn PDF document text
    • https://site-1197000.mozfiles.com/files/1197000/bliss_os_or_android_x86.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/joreloruzigu_nomoditure_kimudigop_zajinedafesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5fc474a09f1c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f8e170acaabc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415934/normal_5fe232bb8fe8e.pdfIn PDF document text
    • https://site-1177512.mozfiles.com/files/1177512/mega_train_robot_transformation_grand_robot_games.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/jazuravazaguz/18740378775.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/malwarebytes_anti-_malware_cnet.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/bayesian_networks_and_decision_graphs.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/cadbury_schweppes_production_method_case_study_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/64595723520.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/labuwe.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_off0000ba67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA67 5692 bytes
SHA-256: e80329dd1804edbc6c374d0fb09b02463f77d6acd2e2ecf087a290b33916b8d5
font_01_sfnt_off0000cdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 9984 bytes
SHA-256: c35b44a6d3486c7997bda4461dfcbfbb859fe1a04f2a7f9bf1940cb0dc551483

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