Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a60a12daa04cc9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 05:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e64149ff551561ba2fddf10e00de43da SHA-1: d35f654ccf188fd56c4c977fb178aeb252ae112d SHA-256: 44a60a12daa04cc9f2c72cd40baebf7c57f934a8f981d71f53bd14a831c93fb2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The document's structure and embedded URIs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=147+julian+date+leap+year PDF link annotation
    • http://faxusupovetek.sportsontheweb.net/can_t_help_falling_in_love_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_601c01cf4dd6f.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/3UhaWgi/mazawadowabesetogixerobi.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/jhi5AtA/ipad_assistive_touch_home_button.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_6039a58a63c41.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/diffusion_process_in_ic_fabrication.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/j9jaLjd/93646432072.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/cash_flow_ratio_analysis.pdfIn PDF document text
    • http://degimogug.mypressonline.com/office_assistant_duties_and_responsibilities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_6041ba626c1ee.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/18674920918.pdfIn PDF document text
    • http://alluniversity.fun/kenuvegasixufdjt6x.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/4657257626ugiej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_6017a77545109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac25b294-35dd-4afa-b854-2db3c4279668/libro_algebra_lineal_larson.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_8ead504ede7241f59819d756ab8d4e9e.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_de13cd9a2b584060ad488ec3669cd105.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffb3616-3555-4495-80b7-00a9b94f6cc3/64154669282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349cc8fd-e945-42ab-82ed-021d8b7d09d6/kupovemasowusivoj.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_3c87325fb2bd4d268823c1a813adbc81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ff6c81-9c1b-4080-aa3a-974f9a03d4ed/symbolic_logic_is_also_known_as.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5076 bytes
SHA-256: 08598a71fba77cdb735b24ee6650c5dccc9cd8c15a70adeafab87158276d0dff
font_01_sfnt_off00010288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 9812 bytes
SHA-256: 60f41dd9fc6b327c00ea57d5302994acc96264970c93affef034619d4c2f4035

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