Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d48144a8af171ca…

MALICIOUS

PDF

76.3 KB Created: 2021-03-08 08:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e509efb5f55a0f1fa8515f05e254b1c9 SHA-1: 3d6cd4ea009278de3fa0d040ad009bfee802bb24 SHA-256: 1d48144a8af171ca15bc1ca1d5c9a23ab258dcb32bb90555cd1d0d687797f1f8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL identified as malicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded PDF objects and external links suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=what+engine+is+in+the+2013+ford+escape PDF link annotation
    • http://walolexokesufa.sportsontheweb.net/zedurukejabawafugas.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/pipiw.pdfIn PDF document text
    • https://palivifu.weebly.com/uploads/1/3/3/9/133986562/bijigovuxoxub.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/asus_rt-n66u_password_reset.pdfIn PDF document text
    • http://tozevikuju.66ghz.com/fuwasivivi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_669b01a357e3422ca59fcc020319c725.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/tojesizijewup.pdfIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_c7d9ee55eee742c499d54c9e5736af39.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_fc9ccc9b3d1f403f9f048a6d2b6f7650.pdf?index=trueIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_9fa33718579d46cca3fd51c4bc6e547f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purawuma/rural_depopulation_in_south_africa.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_5f0914aa5980457dbdfae84b296ef943.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/sivubakevo.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/11233023609.pdfIn PDF document text
    • http://tuxizowivu.rf.gd/android_one_mi_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/6128127612.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/bloons_td_6_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/60754880934.pdfIn PDF document text
    • http://zudozam.epizy.com/cam_woodfield_infant_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/english_grammar_worksheet_for_grade_5.pdfIn PDF document text
    • http://nirobow.epizy.com/zizosumazebufa.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_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 5888 bytes
SHA-256: 11ef0e03f6991659e16a48cfdbe5015c3b544f69505d2f214f16183e7dc6bd90
font_01_sfnt_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 10032 bytes
SHA-256: ffdfb54e17353967d07c8ea71ddd98175c8ff3fbb842ee5377adea1217fccd0a

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