Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ad9a80c7c1001e…

MALICIOUS

PDF

102.2 KB Created: 2021-03-22 01:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 87ae65798516615317e6f9af5f6d5062 SHA-1: 5127fedbb9118d885a64c88656cb2f99d14aaeb9 SHA-256: e6ad9a80c7c1001efe6b0718c6468d05f1fc7bf121ecfddcede1e74a6b824572
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 0.9988

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://bologen.ru/123?utm_term=commissioning+report+of+equipment PDF link annotation
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/tozujote_mujijebopo_zimagefew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_60206fd9a92f7.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/Ghanggu/mobile_number_call_tracker_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5fdc7a3fcc5d1.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/vowaretugovazulifux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427274/normal_5fc7a231b022f.pdfIn PDF document text
    • https://dopozagipixa.weebly.com/uploads/1/3/2/7/132741545/zeletoxar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_604469834a342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_602fd4ae9d5f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_60501242a2adb.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/how_predictive_analytics_works.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/df775413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_6053dbfca77df.pdfIn PDF document text
    • https://cdn.sqhk.co/bidufewo/ihhi6Or/ex_police_cars_for_sale_uk_auctions.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hfhhgia/towosekuteda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_5fe5b57a006e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_6017fa16c7da8.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/YqfMAid/fosusobules.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://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_6c7a24925a824ae598dba9dec14cc0e0.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_d6b47fc41d70435fbee207f4267e847a.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_7321d55aa7504c928fe23bc6c05e9c2f.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_07d597f8ed9d4a06b158d47c450ebf63.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/how_to_look_up_a_citation_number_in_texas.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/jersey_mikes_pepper_relish_recipe.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_off00014689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14689 5012 bytes
SHA-256: ce329e028947824bf523bd64ae46f1a4f32fe3874e1cd6b3694dcbf06df3caae
font_01_sfnt_off00015783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15783 11064 bytes
SHA-256: 1d3dafcc90cc4cca1950bb0661d2c55e251daaf502d66b4b588a7962a24651a7
font_02_sfnt_off00017d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D1D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71