Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30d21d0b5b59cc8…

MALICIOUS

PDF

64.6 KB Created: 2021-02-14 23:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 20ca5d3484397f70d89a946b7bef709c SHA-1: 0e75864ec3e0fe5c93ec3df236a13812909c4c16 SHA-256: d30d21d0b5b59cc8bd7d25c23fc062bc3b8ea44842e500a97772b33807a1f105
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://yafferge.ru/wix?keyword=meiosis+concept+map+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_60205ec7839a1.pdfIn PDF document text
    • https://biluvumilu.weebly.com/uploads/1/3/1/8/131860938/3885527.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/gfja7je/phoenix_weather_hourly_85018.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/wewipu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5fec04f2e8d05.pdfIn PDF document text
    • http://itash.space/5674800045m001k.pdfIn PDF document text
    • https://bunojero.weebly.com/uploads/1/3/0/8/130874162/3ab6260b666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_601fcb473211c.pdfIn PDF document text
    • https://jatazuleb.weebly.com/uploads/1/3/4/6/134662889/971c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601c67e508624.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/tomatuga.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/8275735.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/cgfgcjf/printers_square_apartments.pdfIn PDF document text
    • http://opensalon.xyz/22008693511qhzlm.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/hjjg1je/hearts_of_iron_4_tutorial_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/zgdgjba/73690947764.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/hgGnBgh/45008182179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 5144 bytes
SHA-256: 959f747dd14b39fbef067d0d919dabaf543353f2af472447ffc8a0671bf1c8ed
font_01_sfnt_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 9860 bytes
SHA-256: e9817147ce0ff2f6f231c071960d123867968ca66e31bee5772b21022ce3eba9

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