Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b2681239f80f12…

MALICIOUS

PDF

80.8 KB Created: 2021-06-06 06:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 96c70afa013b6098b5e039295acd6096 SHA-1: da0d8da562bdb591a006ad3b10d8d9e06f51b22d SHA-256: 99b2681239f80f12a56e1c96dbf0c878e30a7702eb7655c2e95493e47fd87179
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users. The primary URL identified, 'https://nomylo.ru/pbw?utm_term=how+to+get+motorcycle+permit+in+virginia', suggests a phishing or scam attempt by disguising itself as relevant information. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely used as a spearphishing attachment.

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 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://nomylo.ru/pbw?utm_term=how+to+get+motorcycle+permit+in+virginia PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajafad.pbworks.com/f/wilowakasadur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a501e5-8dc9-4dfe-9def-e4f0f89a1b4c/nezigujubulegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d75181-9688-4205-ab49-5eb594829076/69622940785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7b714f-4894-4b3a-aca6-b306b349f945/does_wendys_still_do_the_4_for_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d128321-d0de-4a07-ae66-45756be217bc/platos_apology_essay.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144688035/best_android_emulator_for_windows_10_4gb_ram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070d245d-fc47-4acf-941d-4ea5ae4a6469/pelebil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be552427-9667-493f-9f77-1971927e694c/kodisejuzowesujavodonugef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9055ef6a-3865-42f7-a1e8-74bf7c9edf6a/like_mike_2_streetball_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd422de-a72d-4bfb-933c-cc19242ac907/how_to_insert_brita_water_bottle_filter.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/how_can_i_delete_all_messenger_messages_at_once.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/w/file/fetch/144637059/samsung_frp_remove_tool_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91baaea3-b7f7-4eab-a25d-d5b378cd6c39/90519590085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ff7cc9-411e-48ad-a66b-d52bbdfa9c05/daisy_powerline_880_assembly_instructions.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144469236/8540560326.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144412518/54740183798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb81c7c9-5387-44a6-97cd-7b91ea647303/50489486312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bfe7e6-4ea3-4fd6-8618-0d163edef113/what_is_the_life_expectancy_of_a_homeless_person_in_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad20ef6a-d5e3-454f-a4c1-84c0db227a89/can_the_brain_heal_itself_after_damage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5b636e-bcd1-4947-ba2f-d3a5df4cd8c3/honda_3000_generator_spark_plug_gap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61028ab7-ec55-4b61-8565-b0b868a7e900/peer_gynt_suite_no_2_op_55.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/jfk_inaugural_address_analysis_ethos_pathos_logos.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/46286537201.pdfIn PDF document text
    • http://votekotokuz.pbworks.com/f/keponomubefozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22305642-5788-4d96-abff-3f7383e74ad3/samsung_remote_bn59-1241a.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_off0000ffc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC8 5292 bytes
SHA-256: 75c4b4da57c54600fc7ab22f471a1a53c314a17d04c7b24b9a3e85b1631ea085
font_01_sfnt_off000111d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D5 10548 bytes
SHA-256: e494f8ed5a57f488b3cefd3d990e70d15e6342d365578509cfd54bb788bc5ac2

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