Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae465c51bac03796…

MALICIOUS

PDF

76.2 KB Created: 2021-01-04 21:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b744abe03564231479a99e6083876091 SHA-1: eb2b4ca2d68df302ee87c5bf386974fb210830d3 SHA-256: ae465c51bac03796a86c6527ee69d3149dd94a8f85a9849b520e6da0fb2550fa
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary external URL points to a domain associated with potentially malicious activity. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious or SEO-abused content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffine.ru/aws?utm_term=stars+galaxies+and+the+universe+vocabulary+worksheet
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/gelabut.pdf
    • https://rekoxexegatetun.weebly.com/uploads/1/3/1/4/131452740/toretuzixu_vuragetogebifi_sowedazipeme.pdf
    • https://lovunekigip.weebly.com/uploads/1/3/4/6/134685916/refamebalap.pdf
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/c856c269.pdf
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/pojolume.pdf
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5f92df932c76d.pdf
    • https://sajogosekatoja.weebly.com/uploads/1/3/4/6/134682383/wipowitako-zasezovupeb-vibaxev-zutevijajemupaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/db9435b0-cca7-4386-a73d-b5b24a2a4c7a/rudefadiziweligedopivakil.pdf
    • https://s3.amazonaws.com/gebukil/adding_vectors_algebraically_practice_3c_answers.pdf
    • https://s3.amazonaws.com/davolazupivowi/57323213672.pdf
    • https://s3.amazonaws.com/gaxuremewuger/96852857351.pdf
    • https://uploads.strikinglycdn.com/files/02128f0f-bd98-4c75-bd95-6a1048010b67/download_i_took_a_pill_in_ibiza_mp3.pdf
    • https://uploads.strikinglycdn.com/files/75edad1f-b322-4c82-a7d6-885916f7d87f/7856942215.pdf
    • https://uploads.strikinglycdn.com/files/b1971630-c155-401f-a13e-7616a0d5ac48/83437588465.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd98.bin
05b53708c077caff016391a71428ff8d2d1d5ff9055d0c6d247b506c14f637d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 5712 bytes
font_01_sfnt_off0000f108.bin
69dc10553b46f9668bb2ade77fe2379f45a8a963b096d4adf4cf08321a67c608
pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 10748 bytes
font_02_sfnt_off000115c2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 4324 bytes