Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e543a655a4bfa46…

MALICIOUS

PDF

71.9 KB Created: 2021-03-17 02:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d2f6d2d1deaa8a622b0f29602e56d89e SHA-1: 33cb2ac892f4c68cf460644a3d9f892499fa4711 SHA-256: 5e543a655a4bfa463d84eaf99182fb0d9c8731812e8fd5b45ba8c6e22fcb38ac
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on potentially untrustworthy domains.

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://botokaw.ru/wix?keyword=rowenta+commercial+steamer+is+8100+manual PDF link annotation
    • http://table-wait.com/mejibebebodh470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_6050ad5f16d7b.pdfIn PDF document text
    • http://shop-profildoors.ru/46377999485dk80m.pdfIn PDF document text
    • http://runolive.com/74834990703lv3ft.pdfIn PDF document text
    • http://bas-vorota.ru/10321014202ntbfq.pdfIn PDF document text
    • http://tularafujebok.iblogger.org/47812943639.pdfIn PDF document text
    • http://indohealth365.online/671351370372rz3j.pdfIn PDF document text
    • http://secureappeal.com/tupekivetujwp3ah.pdfIn PDF document text
    • http://summer-italy.fun/mechanical_engineering_handbook_unsweg2sl.pdfIn PDF document text
    • http://connexion-amelii.xyz/biology_mcq_books_free_downloadvfilv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_60446d908e1bf.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/dinilederu/daretuwipuwa.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_ddd0d38b93c7419986bce6a9693539b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/arnold_the_new_encyclopedia_of_modern_bodybuilding.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_c0771b5d7af44dad963ebbbb6cad4726.pdf?index=trueIn PDF document text
    • http://xepazap.epizy.com/peak_performance_hoodie_orange.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_a2527e85eb0d4a2a9dceaec59f99bbc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/limigedobe.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/can_i_remove_a_trustee.pdfIn PDF document text
    • http://bisobowezite.rf.gd/85200741308.pdfIn PDF document text
    • http://zaxisomal.epizy.com/67812868680.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_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 5432 bytes
SHA-256: 66bcbcf8c76a312465d3c42fa1c26a180d9c53db4d71759c22fad42f14aedb1a
font_01_sfnt_off0000ec37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 11000 bytes
SHA-256: b910a1d2f92072c6692defc8c178ee93e36ce36f8d4ac1b4d03b3911bda86b6e

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