Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8b66bf3de13b66…

MALICIOUS

PDF

78.7 KB Created: 2021-05-10 19:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 797ad59458addc87d1f6d8ee449ef2e3 SHA-1: e681c11fce7ff3c411611cd82652ea611153b215 SHA-256: 9c8b66bf3de13b6602635b9753986243ddbfcb389e7c5efd87870192b52d4365
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=garmin+vivofit+jr+3+black+panther+black+friday In PDF document text
    • http://reduslim-buy.site/189064893881o1yh.pdfIn PDF document text
    • http://neludetewul.22web.org/what_lens_do_professional_portrait_photographers_use.pdfIn PDF document text
    • http://supermagazforsale1.xyz/gajifoziregowudifigs1ji.pdfIn PDF document text
    • http://0fruits.space/32778484556khk45.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/sony_mini_portable_dvd_player.pdfIn PDF document text
    • http://vifubavawet.mygamesonline.org/la_paz_cable_car_map.pdfIn PDF document text
    • http://goldotzyv.ru/zepapikewerosurabuhqtw5.pdfIn PDF document text
    • http://zefutuwukeras.getenjoyment.net/biblia_takatifu_download.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/42860459625.pdfIn PDF document text
    • http://wisitens.online/475017402758nknf.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/des_exercices_corrigs_sur_les_bascules.pdfIn PDF document text
    • http://elinekici.online/four_feet_two_sandals_reading_level9jt5k.pdfIn PDF document text
    • http://wepisoja.mypressonline.com/how_to_write_argumentative_composition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c65e3f-202a-4044-ad74-b62b3c39bfe1/tetojapupaminabog.pdfIn PDF document text
    • http://jufomotapi.epizy.com/cosco_scenera_22197_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf04d31-64e7-4ac7-b626-3980d469524b/pevivel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f486d40-a279-4293-b796-49029f7ebf35/night_of_the_iguana_noel_coward_theatre_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf11c050-6322-438f-9274-0a8367c4a8ae/doxokevidazozu.pdfIn PDF document text
    • http://pakekaririwofas.rf.gd/zomibaxa.pdfIn PDF document text
    • http://xuperag.epizy.com/relative_atomic_mass_worksheet_with_answers.pdfIn PDF document text
    • http://fumibilulad.atwebpages.com/loctite_680_msds.pdfIn PDF document text
    • http://tunazafagid.epizy.com/ximutulivapore.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/12278887151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2c2ea1-00e6-469d-9dd7-52d6bccfde71/36684995924.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_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 5852 bytes
SHA-256: d65ca948ad117d76fcfb2bdc80eb6f7a09ba2c3baae8d9eed4f09e41a5085ac5
font_01_sfnt_off00010598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 11188 bytes
SHA-256: e4c54efbd5f6f323f7cbbd531937c3bc87d466a1e060a1d9645c9af6be35c0af