Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26fd479554e8072…

MALICIOUS

PDF

118.8 KB Created: 2021-03-28 20:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 601211dd8cce568a55ba68dceac2b2e6 SHA-1: 54b2569314623db34117ef1d33334c3620e6e338 SHA-256: a26fd479554e8072d232720d15a03590901c02863f5f82cc970ed4ef3532d203
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL being https://maypoin.ru/wix?keyword=the+first+and+last+freedom+in+hindi+pdf. The document's structure and the presence of multiple links suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=the+first+and+last+freedom+in+hindi+pdf PDF link annotation
    • http://bitcoinlearningcentre.online/840625009364ycjr.pdfIn PDF document text
    • http://hydrofthol.space/adobe_photoshop_cs5_mac_os_crack76c3l.pdfIn PDF document text
    • http://fitnesspack.net/mejipobonitojurumefeto9lbp9.pdfIn PDF document text
    • http://blaugrana.ru/36577525098px3xs.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/91457942290.pdfIn PDF document text
    • http://helpforteam.com/telc_b2_wortschatzycarg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_e99cb3eff5034d358f70fb64b54586d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/032d411d-53ff-4572-a0a5-9cf6c07d1201/84120251020.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/caffitaly_s04_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d089c15a-3598-4991-b480-f58fe0629b94/which_word_or_phrase_is_the_complete_subject.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d24af8a-7fbb-4626-bf55-e122c07d662e/james_baldwin_academy_special_ed.pdfIn PDF document text
    • http://negavutagogo.epizy.com/costco_food_court_nutritional_information_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/50680536959.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_081656f9ba3d4f188d872393d65cc71f.pdf?index=trueIn PDF document text
    • http://bozolukiket.epizy.com/jodobuvawuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec40a43-a749-441c-827f-87fc3d07f461/logax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e65dd19-95b2-488f-b0e1-4f9b9c02495a/belkin_netcam_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779dc17b-bce2-4f20-b838-eb5a785c1983/paul_foster_case_tarot.pdfIn PDF document text
    • http://mewugibi.rf.gd/81829778560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc8147a-28e0-43bb-8cd6-72cfb5534275/how_long_does_it_take_you_to_get_to_rem_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ed7cb3-2099-4518-a444-66a876e200c2/polk_audio_magnifi_max_sr_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/diet_guidelines_for_anticoagulant_therapy.pdfIn PDF document text
    • http://tipikirobis.rf.gd/math_symbols_name.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18554 5016 bytes
SHA-256: 13ea13bd312cdfb916836fe9a94c497f1d8cc5fb24621dce2eadddb4cc429c67
font_01_sfnt_off0001962b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1962B 12064 bytes
SHA-256: 1b9c621a94d86b0f0b1b5ffa3122ea7f97406e1611c3b7b6501dbaa0a4e2ee48
font_02_sfnt_off0001be9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE9C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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