Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8058c411dbcc9d1…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 02:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 30c09d4c56019aa1b423b51cbbd43e23 SHA-1: b657c123035bbd3180d6482700074e17008299dc SHA-256: f8058c411dbcc9d14a2f3c558f27e675e1f4028994e9f24cef62d3b54b1b4f6f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document appears to function as a link farm, directing users to various URLs, one of which is associated with a potential phishing lure related to 'the belly fat cure'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://bologen.ru/award?keyword=the+belly+fat+cure+pdf+download PDF link annotation
    • http://oneitshop.pro/ti-84_plus_silver_edition_download5sswo.pdfIn PDF document text
    • http://50offshop.info/ironman_bahrain_athlete_guideotajm.pdfIn PDF document text
    • http://meetplafond.xyz/honeywell_1981i_barcode_scanner_programming_sheetok0d9.pdfIn PDF document text
    • http://repair-monokoles.ru/3584670429cfb2w.pdfIn PDF document text
    • http://begemotiks.fun/6635867996bda1v.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/jerisezage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_35222a29ad004eb09113ad6c02fa9363.pdf?index=trueIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_eb3ba2a030fb4b7e92c6c6a8d0c19f5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/english_pronunciation_dictionary_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a02181-b944-4e34-bd65-51c83b786a49/222141080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84e60e3-e8bd-4da6-b983-d5238be0b843/31229677310.pdfIn PDF document text
    • http://gemewepibi.rf.gd/borakimewinifuva.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/nikanavosodovirodiduwapiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45e50a0-7af2-431a-9c60-ea0c3881fcbe/are_they_making_a_new_maze_runner_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/manananopojosa.pdfIn PDF document text
    • http://jadaxanesutav.epizy.com/how_to_solve_exponents_and_radicals.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_7161e03c1b3a44fcbf9a8535cb1b67f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/8217203309.pdfIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_ef5530d4b9e146b789def34ceb844cce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00295f2b-2f55-461f-af0b-548aecfb29db/how_to_change_the_hdmi_input_resolution_for_a_sanyo_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/38805590663.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_87aacd82909649c0bb0fb07da3188807.pdf?index=trueIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_aab42a46688043e18797b5b85a58d1a5.pdf?index=trueIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_b0a02adcd1be47499520993cb104f79c.pdf?index=trueIn PDF document text
    • http://gifibulilak.epizy.com/your_uninstaller_terbaru_full_version.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_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 5348 bytes
SHA-256: dae903abe3328c96cbea1ede7505a67637cd95ec7de57be9e8036afeffc8fa4d
font_01_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 11156 bytes
SHA-256: bad68bc5b49f016b708456f7e966ed767e1fe2df3411900e895285cfad69f70f