Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db2099d6528425a…

MALICIOUS

PDF

87.7 KB Created: 2021-04-02 18:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6040a4325e244040ba35fc40eccafc94 SHA-1: 72d329bcf2ab3eae8072d578aaba576dd25d3a75 SHA-256: 3db2099d6528425a34a091cbf96f1d71538c24a06ef70bc1b73fa8c3c7f54516
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/award?keyword=mastering+elliott+wave+presenting+the+neely+method+pdf PDF link annotation
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/0f5a415.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/zuforasifij.pdfIn PDF document text
    • http://national-verifyteam.com/suzasnsk6z.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/6083972.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/ZRic7ia/despacito_guitar_tab_sheet_music.pdfIn PDF document text
    • http://lulemaxig.iblogger.org/which_garrett_metal_detector_is_the_best.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/dP0gdT5/93375419974.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/9237649.pdfIn PDF document text
    • http://tryne.xyz/42330177898scia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todetizos.epizy.com/statistical_inference_for_engineers_and_data_scientists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62fe144-3050-4a78-951f-4f2ac2d12cbe/spanish_a1_vocabulary_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cffdc1a-8e76-4c4b-a6a9-532d1ca08f65/notobogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52172d03-b91d-4844-9254-9c21c458c4c6/lawn_boy_mower_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecf7f32-a0a7-4772-9d16-81efb5deafb5/digital_humanities_and_it_ucc.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_1fc74ba358924082a2111949547ce35f.pdf?index=trueIn PDF document text
    • http://mijekobafenado.rf.gd/38952524696.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_86d1efe62e8f4321ba335b4e36c6036d.pdf?index=trueIn PDF document text
    • http://bikoguxutova.rf.gd/write_a_letter_asking_for_more_information.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012988.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12988 22144 bytes
SHA-256: 1be08b086159560ddc2dbc4f7087feb31a661dec86297dd7e383eb9b0fe05c5f
font_00_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 5712 bytes
SHA-256: a06a65015f0b2feca27e8f7d2758b2915c49f2d07328a242237d4a8258955e99
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 10616 bytes
SHA-256: 00ee54f85a1d537ae8ab6e612f432f9b0ecae0acb32e1702fdae1956ec5bc87d

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