Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2d78d6c6812946…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 03:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 60c0d8d9a60b710c527945b0b4e0a869 SHA-1: 38367d4edf630d5be95c71df9a179788b7acb1ff SHA-256: 3e2d78d6c6812946df4e561fc6e6344e1671074ae64756bca2f189d90360aff7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to maps and cities, likely serving as a lure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through multiple avenues. The ML classifier strongly indicated maliciousness.

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 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://ggtraff.ru/aws?keyword=map+of+san+francisco+peninsula+cities In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5f90352d71019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f8fd3ac0b813.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/c7d348237.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/2872171.pdfIn PDF document text
    • https://zoditivifu.weebly.com/uploads/1/3/4/3/134316547/xufez_wufob_gazokajaweduze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8715ec73768.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/3e435d808510fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5f9dd975402f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/forupokisip/79993478201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffd7c7e-26fe-4bf8-82c7-ee64af9ac1b8/rwby_adam_taurus_quotes.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_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 5012 bytes
SHA-256: ec5cdd751364bd71e9c639b0687cdfee8ab59a4e6adf7645b513a4f0007dec4b
font_01_sfnt_off000072d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 11020 bytes
SHA-256: ef5dc80ae06d4242d58a71b7b83a53db5d84a14cb2a285826710d2ca69dcfd7d