Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7f6de5ea7fece9…

MALICIOUS

PDF

120.1 KB Created: 2020-12-02 05:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c6f1bf8d7c65d990097d3fcb232968f7 SHA-1: e97c4870c569712c013b8df19b07154eb7a94efb SHA-256: 5c7f6de5ea7fece980bbb7fb940881ba72a6f55a8af6b8ecdfc6faa0049f18ac
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The document body is heavily obfuscated, but the presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/wb?keyword=widnor%20co%20f9%20answer PDF link annotation
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/jaduwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f89d71cd91b5.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/27fffb8ea7253fc.pdfIn PDF document text
    • https://latudawa.weebly.com/uploads/1/3/4/3/134308630/xubobot_pevopamumadupo_gamani.pdfIn PDF document text
    • https://rupusuji.weebly.com/uploads/1/3/4/8/134878943/821c7109110f29.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/wizedumi/epididymo-_orchitis_antibiotic_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/samuko.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc1745661e25426e16f1e2b/1606513752592/maxutoxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b206898-dc52-44d9-bae6-a23fcbf0e7af/22645034837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288c5507-5b14-4256-a63a-37f000fbef3e/demuwipuvodedunakosirik.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/amc_theater_boston_assembly_row.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12052bd14ff0dd29e0ecd/t/5fc3c3272dd96f591860b057/1606665008980/happy_wheels_apk_android_oyun_club.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/10_avatars_of_lord_vishnu_in_telugu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019f1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19F1F 27944 bytes
SHA-256: 0ec3642ef9eaed416156bc5fbdf631e7ead7eff1010650a20718b2ebf1b8a267
font_00_sfnt_off00011d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 22916 bytes
SHA-256: 6e3d9dd3bcbe9791f35851564c32878244efe5999cb460e9140b8fc9285ccf08
font_01_sfnt_off00016597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16597 5244 bytes
SHA-256: 07289c3a8a7c8b381df88768639fcf3173a68c81c4e53c8694a816e24c72b126
font_02_sfnt_off00017798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17798 11492 bytes
SHA-256: a0d1ac1f55f408012cf4607729f559e0c5638c3d54909c0831a932aa675ec901

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