Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d578768ef250cf…

MALICIOUS

PDF

54.0 KB Created: 2020-10-31 02:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb564ed7640a6d3433af4459a1eb9eba SHA-1: 5800518460f21f0725f2ffe188ebc64835d6e2ef SHA-256: 86d578768ef250cf067418d75a97d399695151d5ba7679bbdd5a2b0f1a6981ce
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, with one identified as a malicious redirector. The document body itself is heavily obfuscated and contains a mix of text and URLs, suggesting it is designed to lure users to external sites. The presence of numerous links, including one pointing to known malicious infrastructure, indicates a likely attempt to redirect users to phishing or malware distribution sites.

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/pify?keyword=the+night+watchman+pdf In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/muganazaju_datezasasexipap.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87873f95b1b.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/lefezulaf.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/guligorajiwuv-bigixibipasi-xinerajekipo-napixaromivus.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/xumipama.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/84991803072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0956/2564/files/limegufalu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/citizenship_and_civic_engagement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cbb585-1b7c-4711-8f23-cbd19a581a15/14437351318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5836/2016/files/1.5_m_in_feet_and_inches_height.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/arkitect_cantilever_tv_wall_bracket_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2730/7423/files/vafamarefapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9602/9357/files/75074908697.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B6 3152 bytes
SHA-256: 37bfe9f696d36331d73e629f5da1706bfc6191a4b3ffd899917b560b81f0143b
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 5304 bytes
SHA-256: 1456037d36d560b7c63feb399b8c07cf437907ec68a00240993e7c15faf1ec7a
font_02_sfnt_off000094fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94FA 6284 bytes
SHA-256: e430a36e88bc95a6025883ca982e81632b4778c928baabf071eb096b680bc795
font_03_sfnt_off0000a575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA575 10972 bytes
SHA-256: e614f3a35415ef1ac66dd73d2104df820c945dd4c38cd77430113e25f794843c

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