Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab193cbb2c28d13f…

MALICIOUS

PDF

89.5 KB Created: 2020-11-24 23:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2f8942f790d70faeee3bbbd4e8a1656f SHA-1: 74cda3205e655c5e4d5457c76a7c2b9fcde0f841 SHA-256: ab193cbb2c28d13f1e258d95349ff40930d59371795f27c4268f7086c278faa0
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with at least one pointing to known malicious redirector infrastructure. This suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/aws?utm_term=aghori+vidya+book+pdf In PDF document text
    • https://nakupibizotan.weebly.com/uploads/1/3/4/7/134730769/wusepabav.pdfIn PDF document text
    • https://loponulofaxoli.weebly.com/uploads/1/3/4/3/134324484/gefukilej.pdfIn PDF document text
    • https://wolalusajiri.weebly.com/uploads/1/3/4/6/134600438/nugokata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe0d4b5-8fd3-4de5-a5eb-be719c8922d4/tuwuzaxorowizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676379dd-361d-4955-a7f0-1be4bf599279/john_wick_3_123movies_vimeo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb2c1a2-82fc-4428-8b10-b43c31961567/jivonabuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7729dede-94e6-44d8-94a0-913f81b767de/what_is_an_example_of_possibilism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e918dff2-6d6f-40c2-9900-000fb6a08df1/kankuro_naruto_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bec64b4-3ddd-41a6-a3a5-20665855cc31/33725458269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a03b0f3-1b6b-4e3b-8707-9454b02d82ef/4926284712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341cbb8f-506d-47a1-b519-c6e2c8da9bb3/41254126813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2676d3-7434-4d6c-ace7-ae33f7d2aaab/tokedokobubobafiva.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 5448 bytes
SHA-256: da77ee9d543bf4ebcc0ac2d6094c7e4770a147d2c7857d1162c85d8de5ab4e1b
font_01_sfnt_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 12600 bytes
SHA-256: 4babc987c9beb35b5187e9deb0b499281091e3a2ac99d70fe7adb73a575b716c
font_03_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 16164 bytes
SHA-256: e428de66ceb9deebdb53ebe71febfe16dde38f113f03500bd416f391f33c23f3
font_04_sfnt_off00012e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4D 13056 bytes
SHA-256: 44e6d3d6132187778a8311c59e037777cb1fe261b0892ecea284773387c32e95

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