Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f84b4830bbc241…

MALICIOUS

PDF

70.6 KB Created: 2021-01-31 09:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ec50c0071d255ba209fd9f387931c6c SHA-1: 5aee7c7d9876b0d90d9c3fff44561eb98d850284 SHA-256: 68f84b4830bbc24102679818e650554bd39f808ef7864d26eaf4383588ea965c
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many hosted on disposable domains like weebly.com. The document body, though heavily obfuscated, contains references to 'air fryer brownies from box' and application metadata, suggesting a lure to disguise the malicious nature of the embedded links. The primary attack pattern involves redirecting users to potentially harmful content or phishing sites.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/123?utm_term=air+fryer+brownies+from+box PDF link annotation
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/ponad_dinav_bogamosov_rulameg.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/e6adfc054c.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/b85b136.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/jixapoboganig_walubukeliwivux.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/c1jiNUU/nail_salon_in_the_mall_of_abilene.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/HLhcHif/1199111045.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/purupubaza_gofulujiselin.pdfIn PDF document text
    • https://cdn.sqhk.co/mepawoworu/vgcjbhT/hd_camera_app_which_country.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/fee71f1d80.pdfIn PDF document text
    • https://detaxenenikub.weebly.com/uploads/1/3/0/7/130776267/jevij.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/4716319.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/pobozitijozedajane.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/jiha1jf/juxusud.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/3003974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465024/normal_6006b3e9c18fc.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/868383.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/825ab.pdfIn PDF document text
    • http://todolosepaxo.iblogger.org/agriculture_books_in_punjabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubulunonowov.epizy.com/weragamerumoxuvedeb.pdfIn PDF document text
    • http://farevuzafi.rf.gd/battlefield_2_crack_1._5_free.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_off0000d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79F 5064 bytes
SHA-256: 327e1d40d53a3f4696676dea1cf2dd8f575cca273993a424956de219f3622744
font_01_sfnt_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 10724 bytes
SHA-256: ee72ab35c310d3af2c691ef90728540a453adce5f49c2e9c5fd06f0144b7ffa6

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