Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba0b164c65db603…

MALICIOUS

PDF

84.4 KB Created: 2021-06-11 18:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f1bfb6d2f566db7143a7c6b61c46ac46 SHA-1: 24639ddbb8c3286caa4c77b2491cbc7de279f5fe SHA-256: aba0b164c65db603af280154ab34dbee623a1d60f821db4707b2849a4917f392
156 Risk Score

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 0.9993

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 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://coretry.ru/pbw?utm_term=call+of+cthulhu+7th+edition+keeper+rulebook+trove PDF link annotation
    • https://dexugagemer.weebly.com/uploads/1/3/4/7/134715037/kasemipuviwakixisewu.pdfIn PDF document text
    • https://pefeluleno.weebly.com/uploads/1/3/4/6/134698673/efef8384a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_601d28b3cfe68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_6027ff923e8fb.pdfIn PDF document text
    • https://dubutabinagi.weebly.com/uploads/1/3/4/4/134441981/3275489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_6025990a06825.pdfIn PDF document text
    • https://dotolisode.weebly.com/uploads/1/3/4/6/134616401/tejelufoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_60bcfad94fd9f.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/e2549b44-dd44-42e1-aa3e-2799a18ca496/data_communications_and_networking_5th_edition_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6526cd62-80e0-4667-9077-387081df8ec4/minn_kota_ulterra_80_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49357f90-e5be-4400-8673-8738846db773/92_s10_blazer_radio_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6686ec4-bfbf-4bf2-b100-fcb59fd3e086/zopidewaragumoxujegevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb26f50-4bc7-46e6-8a5c-423513a8bd11/58620290055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de05874-fd38-47e0-9db4-d5d00e0aa20d/what_is_a_female_driver_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f48096b-3930-4ddb-9dfb-686a42492c26/lerefedekiwuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4944fd58-2a05-447c-b696-a2169898a1f2/vilamularajizegoronopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8409b677-14f3-4236-985d-4a1803091bee/zarelutiburifuganutoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85c49da-a11e-45e2-a6f6-8daab3614719/2015_mazda_3_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37083b80-30be-46a5-ae5a-bc05052d4ef4/wonawelanajafulat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102fbd41-b0a7-4a98-9326-16810adda231/68275586074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cadf0b-17f9-441f-a2df-2e654335e3a8/zexusanejarilimawajatobas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af8ff55-082c-4962-9b0d-df9837c0d0a9/bamapudomud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed36fd2d-3982-4a6b-b2ec-970e393fe4f6/infographic_survey_powerpoint_template_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed60ffd6-0b04-462f-8074-4d3a2c810475/16698255966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b0c648-01ca-425b-a921-b62e4c3db246/coreldraw_x8_full_version_free_download_with_crack.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_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 5312 bytes
SHA-256: ecdb8776a385d172f4d94191a585d0de23e8bf957bce13fd99345245e8a93e7a
font_01_sfnt_off0001188b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188B 12416 bytes
SHA-256: 7298a5cffa1432b8296ffc7e9011277bacb8fc8ded8181fda19e949faf32ef61