Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec9864c83019cb1…

MALICIOUS

PDF

77.3 KB Created: 2020-12-15 02:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 02a4262b198654990acbfbbe06e78e87 SHA-1: 1bd044fbf2c319203d15eb08e3f1e48d41d82fd4 SHA-256: aec9864c83019cb13270542c5b393180f15f88d1f706c5e0c294e024e0e46eaa
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'mobile games'. The presence of many outbound links, including a malicious redirector, indicates an attempt to direct the user to potentially harmful content. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=how+to+rip+models+from+mobile+games In PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/293d1def7.pdfIn PDF document text
    • https://kavivapepegag.weebly.com/uploads/1/3/4/2/134235540/a4654ed1d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_5fd2c5eef1ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8893717de17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_5fd7608124a17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fca756ca0e82.pdfIn PDF document text
    • https://vobakedipevurot.weebly.com/uploads/1/3/4/6/134661611/wetodizazojuluxijog.pdfIn PDF document text
    • https://gepolurur.weebly.com/uploads/1/3/4/6/134610134/gikefemixar-titaxunojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fb36cb1ed4fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5ccf068612547ed7f99b1/t/5fd0570f125f6a657a4aa021/1607489296576/86965508682.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d0c6791da6493f6663f7/t/5fc847b9bbb7f45a9284ee3f/1606961082165/652373575.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/google_chrome_40_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/73590132781.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/narasimha_karumanchi_data_structures.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/business_english_exercises.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_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 5552 bytes
SHA-256: 950c2c597cf3f4aaf11c0cbe5c01cb97be5729459e57ba1625a6aae497e147f9
font_01_sfnt_off000103fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FB 10672 bytes
SHA-256: 2146cd5aafce354af88c0e9d7cf87a41c751b082706431abaee3538c9681efad

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