Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf847a3e4aeb98c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-02 01:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9dbf4e76b7be10d83bfa34287f12580d SHA-1: 10f3f0215ce7147879888dab1ed487beebaeb1e7 SHA-256: bdf847a3e4aeb98c738f546eedc86e20e3a201addbdb12dc695c43ef53f11a33
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URLs and the document's structure suggest it functions as a link farm, directing users to potentially malicious content, specifically related to game hacks. The presence of numerous external URIs and disposable hosting points to a campaign designed to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=clash+royale+hack+apk+private+server PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456686/normal_5fd963b88a7c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392869/normal_5fe4b78746e13.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/SSicQ80/biaya_perpanjang_sim_c_2019_jakarta.pdfIn PDF document text
    • http://fikodon.iblogger.org/jehovah_jireh_song_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5fccd67ed2d3e.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/setting_up_icloud_email_on_android_device5bwu4.pdfIn PDF document text
    • http://kyhni.site/xelifujufmhtw.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/zjfhgjf/shareit_transfer_share_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_603c7b54e72c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_60399d3acab13.pdfIn PDF document text
    • http://stixlife.info/how_to_differentiation_and_integrationkt1yc.pdfIn PDF document text
    • http://sfr-espace.best/what_are_examples_of_retail_stores81lzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_603c31e05131f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488346/normal_600071354d2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_5fd380d9451e4.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/lTkRjhf/real_piano_game_online_play.pdfIn PDF document text
    • http://debakabuxaw.22web.org/idsa_pneumonia_guidelines_aspiration.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/hSJjeqP/kingsroadmerch_discount_code_2019.pdfIn PDF document text
    • http://help-mediasupport.com/noworesumokofikakexoteihek0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5febfd4db0698.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 5152 bytes
SHA-256: c3db9567d627ce6c7f9533219b9d58ea3edf5811f8955a85b813712d4b2c1cdf
font_01_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 9980 bytes
SHA-256: 2892386d52858ff360d45a7c5e8bf7eee4338854524aefe6c653a4a70a3f2e16

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