Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee06a7843ae39ad…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 15:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7c6dfc7be049db7ac2a8df41358d3b13 SHA-1: f947d0661e6eeace28fed2af24ac7c8f4c57c5b8 SHA-256: eee06a7843ae39adb11a6ad36d69f7f749eda8033e8c043b2a8ffeb5315cda2c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or trojan activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely as part of a phishing campaign or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=a+7th+grade+interactive+math+notebooks+pdf PDF link annotation
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/5d9f3f.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/dejuvavuj.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/2979041.pdfIn PDF document text
    • http://itanto.space/badimaneiavs2.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/5191092.pdfIn PDF document text
    • https://kiluzamomumu.weebly.com/uploads/1/3/5/3/135344913/9273884.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/price_of_lexus_gx_460_in_nigeria.pdfIn PDF document text
    • http://detonic-romania.website/why_does_my_mac_say_my_hp_printer_is_offlinebnxq3.pdfIn PDF document text
    • http://luloxijemise.medianewsonline.com/jamitutovajodubor.pdfIn PDF document text
    • https://fexipipovunozem.weebly.com/uploads/1/3/2/6/132682859/rudilodal.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/5911700.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/7190454.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://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_7e2332d91eef49168f55497db1824d90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b13b30-cf73-40df-a142-d18a67a1b875/all_my_sons_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26170808-b06b-418d-a77d-ad733c7567f3/que_come_un_oso.pdfIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_3e313dad1b054fe68055e7c7e0b01c88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e676e3b7-f080-46af-95b6-9216bfaad409/92720128943.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_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 5660 bytes
SHA-256: e6d42f6a3eb9efd3f677b0242f49bef3a65f3ce57bb4e8716789dbc91ec51cbf
font_01_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 10348 bytes
SHA-256: f1fdcf66e89c8225f1fb6a3bb886066ec5a0fcf6dcb85fe6e940bb86c4a488dd
font_02_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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