Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d8182b15b79055…

MALICIOUS

PDF

100.2 KB Created: 2021-03-27 22:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 77f7eb1d945a6306b828415abdbd47b3 SHA-1: d989761c9fd8437cac166788eac958c20340bed2 SHA-256: 00d8182b15b7905574164e578163f8ba95e98161dee1203c81ed449510c784ea
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious workflow, potentially involving the execution of embedded JavaScript or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/award?keyword=spoken+english+book+pdf+file+download PDF link annotation
    • https://dixamagajo.weebly.com/uploads/1/3/4/6/134652312/sowevis_werulu_fuwagojedorufa_vudujepusip.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/icNifFZ/wasujonawemawidetej.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/iijErNH/machine_gun_preacher_full_movie_online.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/43c59135a0.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/cYbhfG1/disney_battle_heroes_tier_list_may_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/P0haXAY/mexibupomebulabuzow.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/5485167.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/Kicgiii/17291127086.pdfIn PDF document text
    • https://jejipabiximi.weebly.com/uploads/1/3/2/7/132741556/9888056.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/lakisetedexigok.pdfIn PDF document text
    • https://kujufilobi.weebly.com/uploads/1/3/1/4/131482850/tebope_zuwilokotip_dimuvejilajumor_veboweroderot.pdfIn PDF document text
    • http://waverufusufafuv.scienceontheweb.net/54729728580.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/baxunovogidubekigizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35f3ec8-d303-4442-a9b5-f78301222f5b/2018_scott_scale_710_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb847ce-770f-430d-8b6d-7f7c86a418f1/30538236019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67de6db1-4169-4a21-a36d-cfab877a0e4f/tudiromag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f374f7c9-139f-4371-9c5c-59d4f3175fff/twilight_saga_books_age_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/aspergerio_sindromas_autizmo_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/wow_argussian_reach_reputation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/charlie_malayalam_movie_hd_tamilrockers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 6416 bytes
SHA-256: 2c4cd2f1fda7a68eeb81c013192e381dbe8ba147c14f5bbf09a6b7e6fd893723
font_01_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 5604 bytes
SHA-256: 80bb7190f64a881e4191c6355d31aafe6c883e6c25475553a61d5110e2cf267b
font_02_sfnt_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_03_sfnt_off00012bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD8 11320 bytes
SHA-256: b5d4d7996c7be9dec4b40961cf58b15ce906bc53fcafea5c11a4dbe7d8f9f982
font_04_sfnt_off00015291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15291 15556 bytes
SHA-256: a5a6c4f5fe72732ab308ebd648be8810be0b12fdc1ed9ba14da2f54141c21e5c

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