Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b89de2821e67d3…

MALICIOUS

PDF

88.4 KB Created: 2021-05-11 19:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5aa3e2db48c9e9155c30d6a53973ee3 SHA-1: de9c9cc534ca5071c7e5cf998e1d7e69a764dc1d SHA-256: f0b89de2821e67d3ab0a9a255fd0573dacf7f07436e25775dbb567303efddbb8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=movie+response+paper+sample PDF link annotation
    • https://cdn.sqhk.co/letinumi/Lrsjgjx/stick_fight_archer_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/FNFykij/lipipiwokoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/tGTEmgc/ninja_turtles_bike_stickers.pdfIn PDF document text
    • http://pixelbarista.com/1368301251nfymx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fced402e5ed8.pdfIn PDF document text
    • http://hidver.com/xukaku2bhg8.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxemetakol/iTChdhj/83985773426.pdfIn PDF document text
    • https://cdn.sqhk.co/metumolalub/AuJmjan/orange_money_senegal_apk.pdfIn PDF document text
    • http://art-practice.org/adhe_kangal_old_movie_songs_starmusiqkoirm.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/iageP9i/mortal_kombat_xl_vs_11_cual_es_mejor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_605b6bd83c056.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/Rjajdgi/takeout_mexican_restaurant_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/hgjbByf/12176276649.pdfIn PDF document text
    • http://zoomita.space/delovnwyw2.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/jcid7jh/car_rush_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/riteximeras/jmtY08W/gedegipudazam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_1e7ed976a57c43b39b397088ae1212d2.pdf?index=trueIn PDF document text
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_c767c76034504765b9a953a29272af29.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_8d89a54d19ae424b8f86fdd7bd247ff1.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_f8e82d0106d949a0a5a5e145fd2d852e.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_6a39514de1944a4994bf21f7cbd12fb2.pdf?index=trueIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_e5a5a2071a944ea79d010e7c2c0e4b25.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_eb14a34c998e409e913135cec166795b.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 6568 bytes
SHA-256: 792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5
font_01_sfnt_off0000fa00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA00 5028 bytes
SHA-256: ca7958057b415705881187c23bc722d992a17455d1474d877949e9488657bc19
font_02_sfnt_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 2904 bytes
SHA-256: b4c1c9d8bf3056d26811a2d8e41531e7c3039b81d9304960412dbffff9d354c1
font_03_sfnt_off00011713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 10904 bytes
SHA-256: 20be110d16ee5e18a6a01769d0d71c3fd79a6987c11c1a920b789aaddcf61567
font_04_sfnt_off00013c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C50 16492 bytes
SHA-256: f8fa0b238ec2b54f3f273be207d6bf72ef2cc9cba725d38c55971e460eb35c58

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