Malicious PDF — malware analysis report

Static analysis result for SHA-256 15648febb74f97e5…

MALICIOUS

PDF

90.0 KB Created: 2021-02-28 15:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e4c35284de524cac0089a9a092b9d419 SHA-1: 70736171f881cd2fcf807194701f9d6f2b9ea7d4 SHA-256: 15648febb74f97e5b85b32b17ee55a83491dab5a74afa56fbeabaf0ba365f450
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable or unknown domains, suggests a link farm designed to redirect users to malicious content, likely for phishing or malware delivery. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest an attempt to exploit users via external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wb?keyword=que%20es%20la%20propuesta%20de%20valor%20en%20modelo%20canvas PDF link annotation
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/327242.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/92565753161.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/52aad53e593d3c2.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/7792570.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/a444b45dc5.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/shark_duoclean_powered_lift-away_speed_vacuum_filter.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/soxokokaretix.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/7de8b42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vomigok.rf.gd/bhojpuri_songs_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/ccw_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/border_vector_cdr_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/sefokemisosi.pdfIn PDF document text
    • http://fenulujexita.epizy.com/needful_things_watch_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/53711090622.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/31878717725.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/pokemon_ultra_sun_and_moon_strategy_guide_collectors_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/39291772733.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 5172 bytes
SHA-256: 34122ea70ef0dd4feaf2ef4a27351f1eb79b06c5bb2199ce06754e8cbb22de38
font_01_sfnt_off0001105e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105E 11072 bytes
SHA-256: aac844dd5b6b19e7a18ed9a789256e6cfa01c7a0abed14a53c9b48825f049df9
font_02_sfnt_off00013496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13496 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
font_03_sfnt_off00014a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A21 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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