Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6be2cdc5f37c32…

MALICIOUS

PDF

67.4 KB Created: 2020-11-24 21:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08e127f9b60ef9ce8d62c098f84e77a9 SHA-1: 1b80eaef5431f8b64e2a49ecca645109dc4bb1a5 SHA-256: ae6be2cdc5f37c329c0fbce9c6c29bddc969718028bd9ef92806046b1e7b0367
214 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to reference 'Amoxicillin 400mg/5ml dosage calculator', suggesting a lure to trick users into clicking the malicious link. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO manipulation and traffic redirection.

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://traffmen.ru/123?utm_term=amoxicillin+400mg%252F5ml+dosage+calculator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_5fbb3d54a4948.pdfIn PDF document text
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/fegefanopirir_sumamofesopuwi.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/xasukexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5faa1e6024b2d.pdfIn PDF document text
    • https://rafulosuzeme.weebly.com/uploads/1/3/4/2/134234553/01abdd28a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_5f993c4f1d280.pdfIn PDF document text
    • https://jimakujomeda.weebly.com/uploads/1/3/4/4/134438408/rezofoxofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f8fd59299d8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/125a7c96-487c-42ba-a650-ba73cf9b218e/genetics_unit_test_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab180f8-c1ae-473b-813f-2a07d9a7b140/dupimunipexuzetosed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca84e506-67a6-4856-8ff1-cc6b4e79593a/62119352555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb10a15-8a67-4415-a814-c51918478242/organizao_dos_poderes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8588c6b-56a2-4641-a237-9fe5bbc5de09/58533602467.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_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 5704 bytes
SHA-256: 4951f5f416f9f2a5812030fd5a98e6adf520a158bdc1c701f4425be802a6d842
font_01_sfnt_off0000db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB04 11248 bytes
SHA-256: 9aaf56ccbf46b7e5f2a139d7878bb70b7d2f8742aad8e8cf6b8d7a9bf59c1920

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