Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d42e3ded230d87…

MALICIOUS

PDF

79.9 KB Created: 2021-01-29 14:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a25c03a84ae9d5bf8b19d8698601d4ba SHA-1: ef0822025c34b3a012a08464b6c638e970b6571d SHA-256: 48d42e3ded230d875ba0ac65c25b41e92388ee1f1cbbd723c94f95018ddc3e5c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to various domains, many of which are associated with link farms and redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. This suggests the document's primary purpose is to redirect users to potentially harmful sites, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=hp+officejet+6700+premium+owners+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ff5cf5fc6fd4.pdfIn PDF document text
    • https://wafifeberir.weebly.com/uploads/1/3/2/6/132682897/jisagisupa-kamat.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/posasudo_kotes_domodav.pdfIn PDF document text
    • http://reduslim-official.website/80851823676rv6gm.pdfIn PDF document text
    • http://wonder-ita.space/31166122673yezhk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fdeb265c34b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fc714a3971bb.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/zawobor.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/vemimokapowula_zanozido_somotuzoka_jeriruz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5ff17ad0ddd38.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/nintendo_switch_online_games2l9pe.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/dorurapa-geleg-vimimowi.pdfIn PDF document text
    • http://mestorating.ru/avatar_the_last_airbender_vietsubcy3bm.pdfIn PDF document text
    • http://skidki-day.site/puzzle_bobble_2_character_select5s2el.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5ffbc841c75fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384821/normal_5fcc3c49c774e.pdfIn PDF document text
    • https://pimapavidi.weebly.com/uploads/1/3/2/7/132740410/3700431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_5fd1764b77285.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DE 2968 bytes
SHA-256: ed127d0dec4ade9fa7ee07dc8c31704c8b8b31dde17e7bf82fd68635f291bc29
font_01_sfnt_off0000de74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 5664 bytes
SHA-256: 7efd724a710a408cd745d75a3899c22c538600f5941f0fa45063c2247703f5fc
font_02_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 12852 bytes
SHA-256: d7341a9e65fd3dce8469c8e75a76f2a53289ef5f632a0501fc4cdfa3f5186dda
font_03_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 16208 bytes
SHA-256: 166b72cc4feacd349dc710b341efc86b7e127ae4f75da23da14a144719ef0b98

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