Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60f74a41057078c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 17:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9389664c2226df2089c256a2860a3194 SHA-1: 1f5038b54ad38ab01e25476c835f11514513fe6e SHA-256: b60f74a41057078c426c49e4dde2dd0ba207494217df4f512a9de917e98a7ccf
186 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 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://resalured.ru/123?utm_term=janapadalu+telugu+video PDF link annotation
    • https://zozabamefopofa.weebly.com/uploads/1/3/4/2/134234868/9777244.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/semuwowabetidiweta.pdfIn PDF document text
    • https://roxupabepali.weebly.com/uploads/1/3/4/6/134611875/jetowezunazuwoji.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/ukulele_christmas_songs.pdfIn PDF document text
    • http://jewakololinifi.22web.org/89169692002.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/mexoruju.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/always_with_me_spirited_away_piano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sukokovevaz.atwebpages.com/the_fourth_book_of_occult_philosophy.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_c01f6e24113744a7b7fe074ac088f870.pdf?index=trueIn PDF document text
    • http://fapuvonez.epizy.com/15607087799.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_739e4fd46ab64f2c97af297ab591acb6.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_381f6f49045c4b38969f61cf87bf61cb.pdf?index=trueIn PDF document text
    • http://moxawaten.epizy.com/catanzaro_informa_farmacie_di_turno.pdfIn PDF document text
    • http://zazisuj.epizy.com/michelin_guide_2020_uk_and_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/venomancer_guide_perfect_world.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_8e38e006747f4661a917f7f7a3c495db.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_3f0fd9f7f3784ed28719e7865bd613cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/haier_chest_freezer_not_cold.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_0b2ef6914ece4dccbf4db12601965049.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_d3fa755b8f124783968f2366647f283e.pdf?index=trueIn PDF document text
    • http://bifovigavij.myartsonline.com/9500889306.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE76 4784 bytes
SHA-256: a538ff349e33047d885cc2b07ddf11966a4814cb05ec8f7bfa2219ef99be591a
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 9944 bytes
SHA-256: 72f3a5a11a031c9cf4c5aea0db5a3d94958f6b9ef616c78083a6d25a5bb855a7
font_02_sfnt_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 9584 bytes
SHA-256: 7b2401bdd71a4f67dd82228f6c3e346ddd58591c9106ff11cde0285ab641bb87
font_03_sfnt_off00011b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B55 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f