Malicious PDF — malware analysis report

Static analysis result for SHA-256 005d4be9d0b1b4bd…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 02:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78f7793201b40d4a652887070913f25a SHA-1: b361c50b1c02f136c756f64e1cc08445a59e836f SHA-256: 005d4be9d0b1b4bd4eb04206414246c6555ca551251fce238fc37050aa812d5a
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/123?utm_term=avery+templates++for+word PDF link annotation
    • http://gunudatur.22web.org/82620810637.pdfIn PDF document text
    • https://tilivugex.weebly.com/uploads/1/3/4/1/134108965/bakimuk.pdfIn PDF document text
    • http://prizinsta365.website/printable_winter_crossword_puzzles_for_adults_with_answers44g23.pdfIn PDF document text
    • https://gerasulas.weebly.com/uploads/1/3/4/8/134861388/7218314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fe9153b76c97.pdfIn PDF document text
    • http://lightsex.ru/how_much_is_1_worth_in_mexicoy6264.pdfIn PDF document text
    • https://tezubowaxax.weebly.com/uploads/1/3/4/6/134640868/6315533.pdfIn PDF document text
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/kojosifididulo.pdfIn PDF document text
    • http://itdomen.fun/spondylosis_lumbalis_adalah52wae.pdfIn PDF document text
    • http://gouliwer.online/exploring_storyboardingb83i1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_603e25807faf6.pdfIn PDF document text
    • http://xakovakaxevasul.22web.org/75029021923.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/guwem.pdfIn PDF document text
    • http://petrol-v-pol-price.site/tromm_oe_errornrt44.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://uploads.strikinglycdn.com/files/d4d827fd-729e-450c-b87a-2f6c87719cca/maven_clean_install_multiple_projects_eclipse.pdfIn PDF document text
    • http://vudujufilax.epizy.com/an_indigenous_peoples_history_of_the_united_states_chapter_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34fc560-aae0-41fa-9ce3-65cc3c956a18/waxegebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eae3614-4f2c-4593-ad39-be263b676161/motorola_router_sbg901.pdfIn PDF document text
    • http://neriwolesatopux.epizy.com/adobe_illustrator_shortcuts_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc19707-65b7-4f01-aed0-a1fe3f90ce02/8778305498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2006c89-d0e6-4dd7-81c0-7d37db9f5542/car_audio_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84224129-e9d4-4764-8b92-f76a5fb52135/is_jersey_mikes_chipotle_mayo_gluten_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df59ec9-abff-42b1-832a-627e1ec60a7a/9051397078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546f6696-c56a-49ff-89e9-fd070a47cf8a/el_hobbit_libro_completo.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 5064 bytes
SHA-256: 3c8d3083edd1da04bc781ed576d0f47981f27b4817b861f9a50069c4d471991c
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 11760 bytes
SHA-256: 6b453702accfdaf600a418a6927f721ab967da10b0bd2f85424b436beef63b66
font_02_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34