Malicious PDF — malware analysis report

Static analysis result for SHA-256 0232b078f7608137…

MALICIOUS

PDF

81.3 KB Created: 2021-05-19 07:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5f649cdcaf12cdb880552fd12817e83d SHA-1: 50dea2396aa0279b4ab03a660dca7686f6c7998b SHA-256: 0232b078f76081372c2aae51c257bf34242651a645aa80b1e71d0fc55ef356b6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It employs a link farm strategy on disposable hosting, with numerous embedded URLs, one of which is designed to appear as a free repair manual download. This suggests an attempt to trick users into downloading further malicious 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://vilenefex.ru/strik?utm_term=1992+toyota+corolla+repair+manual+pdf+free+download PDF link annotation
    • http://jeratojovu.66ghz.com/another_day_in_paradise_audio_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_600e119740f76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_60190aedd81a4.pdfIn PDF document text
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/larexipojirovigun.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/9112310c3f46.pdfIn PDF document text
    • http://xuratalusat.22web.org/life360_background_app_refresh_android.pdfIn PDF document text
    • http://vuxokiwi.22web.org/81841636923.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/2064613.pdfIn PDF document text
    • https://kapegidaboxisi.weebly.com/uploads/1/3/4/5/134527108/nepipetafanut.pdfIn PDF document text
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/rufenevagox_tisubasare_xeduvagat.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
    • http://vaxavapokun.rf.gd/58155850061.pdfIn PDF document text
    • http://bepujegixu.epizy.com/bruce_lipton_espaol.pdfIn PDF document text
    • http://jibufunipibavu.rf.gd/50597621068.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/bapuzuzekefonumuzowupa.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/84399457926.pdfIn PDF document text
    • http://libizokize.rf.gd/gusagutuzagibemufemamet.pdfIn PDF document text
    • http://webemorukosor.epizy.com/star_wars_cello_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/modabudipawoxijaporogifal.pdfIn PDF document text
    • http://nepupiborama.rf.gd/sigegilulizilef.pdfIn PDF document text
    • http://misosemarimo.rf.gd/metropolis_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/how_to_read_star_sign_charts.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 5444 bytes
SHA-256: 91bb30ad407872a9b7322eb551673b683ba43f44ec9e7cf5700c75a38a6e292a
font_01_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 10112 bytes
SHA-256: 100e8b7010608a0f1c49cce214775ec432b03c502cff5ca480665efdced453a7
font_02_sfnt_off000128d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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