Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd05a9fdb5f32350…

MALICIOUS

PDF

37.5 KB Created: 2020-10-04 08:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: df678c2ee8159abe9ae5e081025ca5c1 SHA-1: 5a03500148dbb8928865db78fe9583245ecfdd0a SHA-256: dd05a9fdb5f3235020aebfcf533d3fef9667548b957c8d829fcfdbcad5610e48
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though partially obfuscated, includes the malicious URL, suggesting an attempt to lure the user to a compromised site. No scripts were extracted, but the presence of numerous links points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=june+barcarolle+sheet+music+pdf In PDF document text
    • https://site-1042978.mozfiles.com/files/1042978/7932669288.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/xepij.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/koxetoxo.pdfIn PDF document text
    • https://site-1038429.mozfiles.com/files/1038429/donol.pdfIn PDF document text
    • http://xufekipa.johnrwilliamson.com/uploads/1/3/1/6/131606617/8562934.pdfIn PDF document text
    • http://lapisevef.nicolesmacaroons.com/uploads/1/3/1/3/131380505/5346065d2.pdfIn PDF document text
    • http://zoxivi.ausnoble.com/uploads/1/3/2/3/132303382/1701185.pdfIn PDF document text
    • http://files.breinerlawllc.com/uploads/1/3/1/4/131407977/c08385b04597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ff5e6f72-3f8b-4f9a-a3de-d26a551832b9/wotibuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427301d8-928a-441b-821c-4d5a45fdac05/zasipifulokogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470ff73c-14c4-4b71-9ea7-fee852926410/72299145078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df421da2-ecc9-4a57-a319-638ca2589eaa/14196925541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ec7312-73fe-4251-837e-e9769d62a57f/vijenumalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4706 5408 bytes
SHA-256: 7e705ccc0fef58ca5510a0a51950e52b7af24b8c9cccd8a51e022a26eb57ba15
font_01_sfnt_off00005924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 9780 bytes
SHA-256: 0a5be6535960b026d240642ba709d3c0789be3407d3c307359bbf57e5d5eba14
font_02_sfnt_off00007aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.