Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58c64b4953988b8…

MALICIOUS

PDF

69.3 KB Created: 2020-12-02 22:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eec6e91d9a48937fb90596cd36143c0 SHA-1: 9def9bf6b32e3e04953dbc022202c669e267c059 SHA-256: f58c64b4953988b87d83dd552eccfa58419c589ea8de4866ad22fbe0d620becf
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a PDF link farm pointing to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=asi+es+in+spanish+means
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/c7fafefd4.pdf
    • https://nobozufale.weebly.com/uploads/1/3/4/3/134322784/5ef429f24360.pdf
    • https://mubuvume.weebly.com/uploads/1/3/4/8/134885019/karorelepi_lebiv_popalikazuxesew_basaba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/naramuro/85029178815.pdf
    • https://s3.amazonaws.com/dobesogum/91489394947.pdf
    • https://s3.amazonaws.com/tedowafomaru/lessons_learned_template_sample.pdf
    • https://uploads.strikinglycdn.com/files/384aaf31-6af2-4665-b9a3-06a57c42cdf0/hotel_indigo_winston_salem.pdf
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc34ea42dd96f5918583cc1/1606635172573/andrew_palmer_bel_air_investment_advisors.pdf
    • https://s3.amazonaws.com/xisefowu/self_help_marriage_counseling_worksheets.pdf
    • https://static1.squarespace.com/static/5fc1b24012facd59ceb28ac7/t/5fc77541c7c45a5eafa76bd8/1606907212863/canon_camera_connect_wont_download_video.pdf
    • https://s3.amazonaws.com/gaxuremewuger/moneyball_imdb_parents_guide.pdf
    • https://s3.amazonaws.com/xoxaneral/wikonetel.pdf
    • https://s3.amazonaws.com/benuka/sqlite_android_studio_github.pdf
    • https://uploads.strikinglycdn.com/files/900f7339-bdbe-4690-ad39-1a02f87b715a/wimoripemivoxojot.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd090f8bc8713fe6ff5e67/1606224148256/algebra_2_study_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31a.bin
889b4fb5051e91313372bd8abcffb0ddcca89c049eb0cffdce728b5809225008		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD31A 4920 bytes
font_01_sfnt_off0000e3b3.bin
37e3fe24b19f8fa14a3b2b14b2b8d31c70dc1ed89c384d369fdf2fd74731b4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 10800 bytes

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