Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a10cc78b902ffc…

MALICIOUS

PDF

79.9 KB Created: 2021-04-09 01:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 864a54ddb49e3842abf54e12196dce51 SHA-1: 6e7ac5de9b68c02fa60367d5fe275b9390e2f07b SHA-256: e5a10cc78b902ffcd469e2350db15e746c6ab1dd2fb7622850d79dab91953db9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' reveals a large number of external links, suggesting a tactic to drive traffic to potentially malicious sites. The presence of embedded URLs further supports the attack pattern of directing users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=how+do+you+do+bbg+workout
    • https://cdn.sqhk.co/tibakekavero/Igj3hen/best_call_blocking_for_iphone.pdf
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/kapadaxupununalitemu.pdf
    • https://cdn.sqhk.co/nokulebepoba/AZhbYgA/79836885824.pdf
    • https://cdn.sqhk.co/lojadisexudo/Ijagigd/51856421106.pdf
    • https://cdn-cms.f-static.net/uploads/4462350/normal_6039f2a44ac85.pdf
    • https://litapofigiwo.weebly.com/uploads/1/3/5/3/135349015/sujevupomufil-jidesuretuses-remapotew.pdf
    • http://bokaxakoz.sportsontheweb.net/puzudonobevuvetemabe.pdf
    • https://degunosusoteri.weebly.com/uploads/1/3/1/4/131453230/da56dd7c98af3a3.pdf
    • http://warewakeb.sportsontheweb.net/tomukobebonotepexabomu.pdf
    • https://cdn-cms.f-static.net/uploads/4482399/normal_602ae6bb49b78.pdf
    • http://wolapikugeb.iblogger.org/buximuvalevi.pdf
    • http://vudifabofugejij.medianewsonline.com/shapes_and_relative_energies_of_spdf_orbitals.pdf
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/9375431.pdf
    • https://cdn.sqhk.co/senepaderu/jcidhea/vista_links_golf_club.pdf
    • https://cdn.sqhk.co/gufezitaxato/aggghjg/72183496773.pdf
    • https://cdn-cms.f-static.net/uploads/4417653/normal_600d6c30450ee.pdf
    • https://cdn-cms.f-static.net/uploads/4457620/normal_603238efeec37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://miviloliwibo.rf.gd/praying_for_your_future_husband_free_download.pdf
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_f797117f9fd3419792a1ba0c4000267c.pdf?index=true
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_8945f0c13a734b289bf1fb99e1dd368d.pdf?index=true
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_c248466373d0469e99c4f27deb02eb79.pdf?index=true
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_eed15b7480a44a32a453f4edb88b8a47.pdf?index=true
    • http://vapewokadovusa.myartsonline.com/engineering_drawing_textbook_free_download_n2.pdf
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_2f2a211a0d5f479886c8f6dce1c7d6b8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a0.bin
44a421e599683b3499f958b664a343861ae7c3d6638af31f2534a219e6d81033		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 4932 bytes
font_01_sfnt_off0001098e.bin
6aa2e5e8ae6bbf433cf8bc5ce508920b11c1f4a5f7f15ae080d1602ed12887de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 11472 bytes

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