Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e43abe08087f74…

MALICIOUS

PDF

78.0 KB Created: 2021-01-23 18:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 57c55cf70f5d53824c6fe1cca0805aff SHA-1: 2d4f892c02d0397f5b8a2c6862239b53a1bbb922 SHA-256: 99e43abe08087f74fe99ff86292fdc5ebc3185f850a04c256c56550ce6a9f68b
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document body and embedded URLs suggest a lure related to 'apk' files, directing users to multiple suspicious domains. The presence of external URIs and link farm heuristics further supports the malicious intent of redirecting users to potentially harmful content.

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://druttle.ru/wb?keyword=raising%20rank%20insignia%20hacked%20apk PDF link annotation
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/sidububo.pdfIn PDF document text
    • https://site-1172371.mozfiles.com/files/1172371/android_7__0_bypass_samsung_account.pdfIn PDF document text
    • https://site-1166701.mozfiles.com/files/1166701/46867278175.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/eChi0jd/jegumofe.pdfIn PDF document text
    • http://boputev.66ghz.com/48215047381.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/rijuxi.pdfIn PDF document text
    • https://kevibudoja.weebly.com/uploads/1/3/0/8/130814666/garamiberimit.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/skyblock_mcpe_servers_fr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384035/normal_5feda506bd44c.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/c3d2fc294bc68de.pdfIn PDF document text
    • https://site-1262132.mozfiles.com/files/1262132/backtrack_5_r3_free_windows_8.pdfIn PDF document text
    • https://site-1173730.mozfiles.com/files/1173730/zasazelolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_5fd76b8ce0151.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/nibgeij/walmart_moneygram_online_not_working.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://s3.amazonaws.com/bomupi/bonerefupovani.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/abide_with_me_free_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/23455124366.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/aironet_cisco_configuration_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 4972 bytes
SHA-256: 4606a1c62fc2a45ee59963f97db283507c1ad6c0f5c5657d31a85402e7b5189c
font_01_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 11096 bytes
SHA-256: 828ef2dceaaddcff88a0b01ff77face75b20c4977f15cc6e82c95ce02d3282c7
font_02_sfnt_off00010536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10536 16668 bytes
SHA-256: fd3e7bacf2700be5602a7b6c9306c4dfb11e4bd2eec2067fea1709600b359368
font_03_sfnt_off00011c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C50 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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