Malicious PDF — malware analysis report

Static analysis result for SHA-256 648974dbae9138ad…

MALICIOUS

PDF

91.3 KB Created: 2021-03-19 03:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ebea93aba69732c3968926480e1534a6 SHA-1: 060adb16b7f4fb2e5396ce9048b0eb3f4a8d2d4e SHA-256: 648974dbae9138ad6bee62770388a5c838a8c026f539d79adf0974748e8c8bf0
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and redirecting users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, suggesting an attempt to drive traffic to potentially harmful content. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious document designed to lead users to external, likely malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://mezovuduw.ru/wix?keyword=army+enlisted+ranks+abbreviations PDF link annotation
    • http://ribavid.medianewsonline.com/jatavogunizuwu.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/5157107.pdfIn PDF document text
    • https://zupevojug.weebly.com/uploads/1/3/0/7/130740492/41301a38a70.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/tutorial_carding_android.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/5647620.pdfIn PDF document text
    • http://sujolisake.medianewsonline.com/zadipa.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/rinod.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/3bfa7c5df3d04c0.pdfIn PDF document text
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/xejote-lopobijofimimu-jemugivi.pdfIn PDF document text
    • https://gotivewa.weebly.com/uploads/1/3/1/0/131070711/gusatot-jeviku-sarob.pdfIn PDF document text
    • https://xisosisudotaju.weebly.com/uploads/1/3/0/7/130738948/tokesot.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/gezejoputiwinu/value_appraisal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/82022294241.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/how_to_drain_a_caldera_hot_tub.pdfIn PDF document text
    • http://najexenij.onlinewebshop.net/kilofavivinuzopuwipamezir.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/76653265445.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/uploaded_premium_link_generator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/41469655300.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/movie_maker_app_free_android.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_off000126e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 5328 bytes
SHA-256: cbbc085176be6479d1fea1f3aeacdfdae2650d6031af66fb910f6fb5e08bab25
font_01_sfnt_off000138f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F2 11488 bytes
SHA-256: 25eea186aab1eb914e56fcaff2a4dd58dda972d3567d50a7f2d6874729cf5249

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