Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38849c1a5ba5ab4…

MALICIOUS

PDF

139.9 KB Created: 2021-04-22 05:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7e28d45785d1ccc785406da3a1bafa42 SHA-1: 2f85318d47edcc191c95320babecb3f1df6bdd3d SHA-256: f38849c1a5ba5ab4881c5a006cb74138a45eeae784c087dbdabe91344a5d1a58
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL being used as a lure related to "data analysts in demand in canada". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple disposable domains and link farm heuristics further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=are+data+analysts+in+demand+in+canada PDF link annotation
    • http://rafupofamurawaf.mygamesonline.org/36146416505.pdfIn PDF document text
    • http://bupadakibagada.iblogger.org/gangsta_granny_book.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_6062f89ef13ca.pdfIn PDF document text
    • http://world-wild-shop.com/3063561223p3ayt.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/xobisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_6027d06a4ed43.pdfIn PDF document text
    • http://kodavuviguwu.mypressonline.com/angel_broking_closing_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5ff4c32ec0e1e.pdfIn PDF document text
    • http://tersq.space/33858604167uxoox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5ff1110558d4b.pdfIn PDF document text
    • http://kevexupivuzovif.iblogger.org/95549068139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinedasuzo.rf.gd/23632449078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91dd115-9823-45af-b890-bc03494bae8b/newsmax_channel_on_cox_omaha.pdfIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_36be88cc03284c15904f6c7b1748fa42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6160f79-5eaf-4158-ae9e-90d26fd39453/dd_4e_heroes_of_the_elemental_chaos.pdfIn PDF document text
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_963879f960dc446f885d69b9980866d3.pdf?index=trueIn PDF document text
    • http://zezajezo.epizy.com/types_of_rocks_and_rock_cycle_worksheet.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_02e4002ef2d64dddbe7d450667026c35.pdf?index=trueIn PDF document text
    • https://7d33af4c-acfd-4996-9436-348e89828b5b.filesusr.com/ugd/289672_12cf6723b9744e45bb0fb9f72dee24c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68b0d4a-b30c-4c05-b062-368c9f7b952f/free_willy_2_whale.pdfIn PDF document text
    • http://werapitagu.rf.gd/88756716774.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_30df78ad44bf4efcbe4486831e8bfcd2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8AA 5176 bytes
SHA-256: 60d26e03c7c7829cae334b67c98d01e9efac71ccecb3763fe9bea2d30f1c962f
font_01_sfnt_off0001fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA39 11200 bytes
SHA-256: 990a865a7e2f9bd9337deb6819a4d62ace77e689bd4ebc21735e7e8c64e699b4

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