Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46b9aeb6ccbab96…

MALICIOUS

PDF

153.1 KB Created: 2021-03-15 06:33:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 031bd358060a41af466327e15ae2707a SHA-1: b92864493e593ae7d145ab76e520d2fad4927ef2 SHA-256: e46b9aeb6ccbab96c04f80041d561ce223baefc700f44e6094aedae2dca49d79
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://fokemale.ru/award?keyword=mammalian+cell+culture+protocol+pdf PDF link annotation
    • http://ginajazadunoxix.22web.org/collagen_eye_zone_mask_30_sheets.pdfIn PDF document text
    • https://nobopejulalajib.weebly.com/uploads/1/3/4/6/134621416/72746290e93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5ff975c770c36.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/1291dbb9.pdfIn PDF document text
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/733816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_604eb199f3e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_5fd627ea42bc2.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
    • https://2e243477-d0d7-4d97-acdd-9ec3899f5e1e.filesusr.com/ugd/5ecadc_37fb649e517e41589ebb05a2ca73a0c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a372aea4-71a4-45c5-8ee5-c8699e553e52/how_to_export_blender_2d_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/font_billabong_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4244c70e-e216-46cc-8e1a-8c246c9ddbe9/rozomebojefepot.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/kakizoxujatezorox.pdfIn PDF document text
    • http://rutuvofogiseba.epizy.com/harry_potter_y_el_prisionero_de_azkaban_edicion_20_aos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bb7535-43b7-4513-92ca-6f8590b92751/recitation_of_quran_by_qari_abdul_basit_mp3.pdfIn PDF document text
    • http://joxumokuri.epizy.com/kizorirurabiluvadixuwox.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_cfedb955a50c417bac31d981ee0a5854.pdf?index=trueIn 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_off0001f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F71C 5008 bytes
SHA-256: e3a6065eef85d4b3b2ab295b4a6aafaef54e462886b0aafe4d51fa6bc66e8077
font_01_sfnt_off000207fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207FD 12724 bytes
SHA-256: 095142295ef9693de38f8d494da304d6ab91ec926cfb03d7bc95b768858caf3c
font_02_sfnt_off000232b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x232B7 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off00024751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24751 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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