Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e8a62262ac1730…

MALICIOUS

PDF

77.9 KB Created: 2021-03-25 07:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c5e3a50da51adf5b8a50e6b5dc09a62f SHA-1: bab60b336bba7e31f02b9fe122011d1caf5e1fac SHA-256: 86e8a62262ac173040d3831690bb48f4ebc78b3371fa1a07a35426df536f0f48
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The document body, though heavily obfuscated, contains references to 'manorama year book 2020 pdf download' and is associated with numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. This suggests a phishing or malware distribution attempt, likely using the document as a lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=manorama+year+book+2020+pdf+download PDF link annotation
    • http://vedojuburokag.22web.org/onn_wireless_mouse_not_working_mac.pdfIn PDF document text
    • http://bhd-management.space/tinkle_story_book099we.pdfIn PDF document text
    • http://forpost-electrica.ru/kegiwalidojekejupgq9qd.pdfIn PDF document text
    • http://negozio50sconto.info/barcode_font_free_code_128vo98j.pdfIn PDF document text
    • http://xbet1.fun/what_materials_do_i_need_for_cricut_makervfznw.pdfIn PDF document text
    • http://balonedud.iblogger.org/chief_information_officer_treasury_board_canada.pdfIn PDF document text
    • http://liketsven.xyz/luzosojidenizapalovejalilsbnw.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/fe40dc8e-b1af-4a76-851b-b9dc7155bf63/2013_dodge_grand_caravan_factory_service_manual.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_25bd94825b2f4c669ff1d46fd3596922.pdf?index=trueIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_641074796c1b4823b196e77548c3c7fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/abbott_freestyle_libre_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9259be-aba6-43d9-a26e-9befbed40762/jofedabuvofepoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/22969602604.pdfIn PDF document text
    • http://dinagujepapure.rf.gd/binunititopure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546d169c-af50-4351-86ee-89cebbd6577c/tom_sawyer_and_huck_finn_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/jubilant_foodworks_annual_report_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 5684 bytes
SHA-256: e9a2441dc6259a6fac882558a239084f009228a597e083cebd68f07c9fc41903
font_01_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 10568 bytes
SHA-256: 9f3bcfd7b934f235b8740e81734d50cc0a812eab9f89a31598846aa9aa1f4f9a
font_02_sfnt_off000114ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EE 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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