Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbf3abd7f9f8e33…

MALICIOUS

PDF

79.3 KB Created: 2021-03-24 00:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 009ee62dd4ec3f62cddd8170e7240c30 SHA-1: 4ea90a039e5743d563a3e31560c6879c6e03dab0 SHA-256: 1fbf3abd7f9f8e333b3579b4a0867a98a984b3270f9e93183f2b1da8da880442
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm, and a primary URL related to a sales lure. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing or trojan payload. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/wb?keyword=weber%20genesis%20e-310%20gas%20grills%20on%20sale PDF link annotation
    • https://mibimosa.weebly.com/uploads/1/3/5/9/135959727/fowotagobafog.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/meluraf_fejavotozap_kezunosir_fijekegulum.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://s3.amazonaws.com/sojaxub/www.bpsc.gov.bd_40th_bcs_result.pdfIn PDF document text
    • http://kazixovo.rf.gd/4379405475.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/58506974663.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/37019316985.pdfIn PDF document text
    • http://duxejuxaxeze.epizy.com/game_head_ball_mod_apk.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_2ae032de97c4416d822cfaa2c1e92140.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_0facb3804da04cdab458d862c0c9b8aa.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_5b9242e7203142f7a5e70c2a22aeeb4f.pdf?index=trueIn PDF document text
    • http://buzuvemujogumob.epizy.com/basusas.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_ffd85759c401416e8d19aa6c37dc3d5d.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_57a54e18807d491aa4d355a0af26ef2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/11874630533.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_d8af3f19d13e43249332c14110948e13.pdf?index=trueIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_0209b657f54e4a5aa97781bf3e09e074.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_183dc59453da430c906dbbd9f814232b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/voxujirewinowin.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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 5104 bytes
SHA-256: 668f548c7aa328e1c051bb3697ccb4c7360f2500c0e2d97d8565689289a294c3
font_01_sfnt_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 11284 bytes
SHA-256: b6b68a98620ddb88da118c5036b86c2c58fb4cfbd5aa385222099c034e949e5f
font_02_sfnt_off0001223b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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