Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e7c9b4a3b15bdc…

MALICIOUS

PDF

53.9 KB Created: 2020-10-19 14:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1a11e7be9ed58807cc171cae18793e81 SHA-1: ea6665c08fd920308f326772560fda80546a7b70 SHA-256: f5e7c9b4a3b15bdca7d4d20fd652a5c393b5f6f9e91ac228a092a434255f27d9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, many hosted on disposable domains or link farms. One of the primary links directs to a known malicious redirector. This indicates the document's purpose is to funnel users to potentially malicious content or to generate traffic for SEO purposes. No scripts were extracted, but the extensive link farm suggests a malicious intent to distribute or host harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=tablette+android+avec+clavier+pas+cher In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f8a9ea863b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f87bdd39aaf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f8a9b4c084a1.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8a2ca60a3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f874088cefd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87eb362139b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8b90445f166.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/desodoxefawasexa.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/pijepa.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/mudovef.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/3253553.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/pubiturumefuxetibe.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/rujajelipepubepupuvu.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/zananadag_momazeji_zosud_raxejagemedi.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/7777132.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/papoj-sigemosetinip-wigikolukunugu-liwux.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/aeefcf0.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
    • 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_off000080e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 5100 bytes
SHA-256: e327d07f3475a4b1e34b08ce27fb35c3fe00a93941d132d06a04ea50f2e7e721
font_01_sfnt_off00009224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9224 12844 bytes
SHA-256: 6492cf7ce85e2df9c9724adde507c3a482978c016c939cc83b586f2c51c5af4d
font_02_sfnt_off0000ba32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176