Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77fea4cf84bbde6…

MALICIOUS

PDF

88.1 KB Created: 2021-03-14 10:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0c283833752246cfd4e93c6c967d9afc SHA-1: f78b6447963f4a706778363a0cfeda7dbc1bb822 SHA-256: e77fea4cf84bbde614013727aecdd2ce1ecc48bf793decb162ec51532e8e5e30
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable hosting and likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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/wix?keyword=cell+transport+worksheet+answer+key PDF link annotation
    • http://tonojodozif.mypressonline.com/524385353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5ff24dec58d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_601458f9c41a8.pdfIn PDF document text
    • http://coins24h.com/87796418922frb5k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fcafb928fe19.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/bhdjfhb/zombie_royale_quads_or_trios.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/dEicnia/49676102020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_6041ee5e09bfc.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/gehWejj/radug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_60167c7f662a8.pdfIn PDF document text
    • http://help-bluebadgecenter.com/clasificaciones_de_las_cuentas_contableschifq.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/e8604314-4f62-43cc-a929-ba7b9a09f473/primary_succession_worksheet_answer_key.pdfIn PDF document text
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_b39a1cb8f48048cc876f7657abe331e3.pdf?index=trueIn PDF document text
    • http://xufolat.atwebpages.com/ledasavaduruzukibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b386e068-71f0-4b5e-b950-33ffba293120/vuxapexipozijodavaniju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa67087-d377-4f39-ac85-f7d49dcf8eb4/89636293355.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_45528c94a5254fb2b282f50c192aa134.pdf?index=trueIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_67ac2ed53ecc4187a0b71dd6ad5cfce9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faeccef-ae99-4ae0-9f67-7b0908f4fb5c/what_are_some_neck_exercises.pdfIn PDF document text
    • http://femagela.myartsonline.com/68189950408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7adbb42-ae47-4803-b478-04893ed6e1b6/fazoluz.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/2010_chrysler_town_and_country_3.8_engine_oil_capacity.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_2056e9e8c47b4e28ae1d73b41da466f8.pdf?index=trueIn 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_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 4928 bytes
SHA-256: d4f553eff642394748cd244f213874860349fc97162ad48ce0def4b04ea8ee7c
font_01_sfnt_off00011a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 13164 bytes
SHA-256: 0008b5b9a1b14ae90cbd9250965848c9a6d7c2fbba44cc0dec7ad72f072c29c9
font_02_sfnt_off000144a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144A2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.