Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab1d29a828807f0…

MALICIOUS

PDF

95.9 KB Created: 2021-03-17 10:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f611ddc30a2bbdbd193495590c92a46a SHA-1: ec28fd369be8b13bb676d9dccee27a619607285f SHA-256: eab1d29a828807f0983a4b64a1caf43a8bc604516e0b430fd26dffed9c554d0a
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The primary malicious URL, 'https://baarspo.ru/award?keyword=electron+configuration+chart+spdf', is presented in a context that suggests a phishing lure, disguised as a search result. No scripts were extracted, but the PDF structure and embedded links indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=electron+configuration+chart+spdf PDF link annotation
    • http://manidat.sportsontheweb.net/41309192637.pdfIn PDF document text
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/444844932019d.pdfIn PDF document text
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/gemogutakulonajuwiw.pdfIn PDF document text
    • http://rasixojolebasug.iblogger.org/how_to_write_covid_essay_med_school.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/68027880934.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/algebra_math_worksheets.pdfIn PDF document text
    • http://punevufazeji.iblogger.org/50759919544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/54be58fe-4b9b-4b20-bf7c-ce18a273f896/gofulitibugit.pdfIn PDF document text
    • http://kowesodi.rf.gd/admission_form_format_for_coaching_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ad4666-08c5-41b2-9b5d-f6f032d211ab/14565058593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f492a8e5-676a-4612-9225-fb1eaf89b795/how_to_start_event_planning_business_in_india.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/tibagojafirumokegali.pdfIn PDF document text
    • http://wukofufo.rf.gd/soluxuzupinipoba.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/taxatokumugomiteri.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/types_of_surgical_knots.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/pididituwelozu.pdfIn PDF document text
    • http://diruxepuf.epizy.com/perfect_dumbbell_bench_press_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1057292-1a10-4a8b-b9fc-417cd10d04d1/barska_safe_keeps_beeping.pdfIn PDF document text
    • http://vutilunero.rf.gd/xenazuzufunixarezorijem.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_off0001380a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380A 5376 bytes
SHA-256: a2c63a5fb6a7433a6f692f5c5bcad6d65d9db57ce2705285168048847f95ce59
font_01_sfnt_off00014a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A54 11356 bytes
SHA-256: 39cd49261c7e71af014c91125a489c1092f199d0f9bf79680b0e7093863f9ab4

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