Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce142382da9339f…

MALICIOUS

PDF

85.7 KB Created: 2021-05-08 08:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 12a8998713f287091b00a269b013cfa6 SHA-1: 1083e2809f59e59d0969d1a0a1687582098e6074 SHA-256: cce142382da9339ff69f1015a8b606a967cc444e5ed04026ab248a29b5de54aa
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism for phishing or malware delivery. The document body, though heavily obfuscated, references 'Donde esta eduardo chapter 3 worksheet answers', implying a lure to trick users into downloading or visiting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=donde+esta+eduardo+chapter+3+worksheet+answers PDF link annotation
    • http://kovokowem.iblogger.org/culver_s_application.pdfIn PDF document text
    • https://dedopaka.weebly.com/uploads/1/3/4/4/134498192/5974115.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/a11f191a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_60646dae289a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465914/normal_60052ef193cba.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/loturulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5fee6a839b033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fd9a8ba4ffa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_60026c24492e2.pdfIn PDF document text
    • http://bopalinowojege.iblogger.org/how_to_report_multiple_regression_results.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_6055f55ab2dad.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/21041315370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_6046bb7b29343.pdfIn PDF document text
    • https://tatazazotogowe.weebly.com/uploads/1/3/4/6/134618267/paxuxitetupojifitina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_604816cbb1d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_60527aaa1f74c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486042/normal_5fca60e393b37.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/9367085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/tidewofopojig.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_58c66a0a327746c6a79f439033ce6986.pdf?index=trueIn PDF document text
    • http://jabowedufup.epizy.com/hamburger_essay_writing_template.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/sarcasm_and_irony_worksheets.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/30558223236.pdfIn PDF document text
    • http://muzowonuneferew.rf.gd/3789614963.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_5ce986ed34004dca9fd41346f8698315.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_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 5448 bytes
SHA-256: 9aa0e364c666437cf9b9c4729799747c8b71514a8859746fceac86fa0a21deb0
font_01_sfnt_off00011d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D64 12592 bytes
SHA-256: d8078a5aa737e9a2d6c15980865e76ed37e49090b3fab5b1194d080622319f65