Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14c7400b87c154a…

MALICIOUS

PDF

63.4 KB Created: 2020-11-14 15:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 478581faf2bb0df2982c28c37c698a67 SHA-1: db1ac1b99aafa747a32cc8b2913e2cd438d077f3 SHA-256: e14c7400b87c154a0de3fee07ef700f9171a654bf90ef89c7a02e02e675c1c2b
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, suggesting a phishing or link-farming campaign. While no scripts were explicitly extracted, the presence of numerous external links points towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=juguemos+a+leer+y+escribir In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5f9b7184245f4.pdfIn PDF document text
    • https://lojizeli.weebly.com/uploads/1/3/3/9/133997115/d5d58a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8d6fc9b30ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f8e17c4b11e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f989b599ad71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f9c579999980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8a01bba3f23.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/mimawazukidije-sivavigipaju-dagenur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_5f9e5e9d24a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_5fab2c30752a6.pdfIn PDF document text
    • https://fozidisevuxife.weebly.com/uploads/1/3/4/3/134356050/7386033.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/45cc76713463b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_5fa41d949689b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fa60eec30957.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/c1df9489-602d-419c-8181-abfda31eeb50/linear_parent_function_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c7718e-28c3-4749-a6d7-67b24ed4f42b/aa_back_to_basics.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_off0000b9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A9 5348 bytes
SHA-256: 763240a11ce6e924a76e9174ebc2bab48162880d28993d94f65f76e0c7b19894
font_01_sfnt_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 11776 bytes
SHA-256: 11a00017661d05bcef199b90c9ad1015cf3469cade02e641d49e477583b7f535

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