Malicious PDF — malware analysis report

Static analysis result for SHA-256 defe364f264f5255…

MALICIOUS

PDF

76.7 KB Created: 2021-03-08 23:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 51cd5d2d6c3438edb47cae485f2e3aae SHA-1: bb25fb911abd9ea24a69317126a036d3bec206b2 SHA-256: defe364f264f5255e5fe5d9fe80ee72557a6acb00f843712eeb6e17f891cb398
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with a link farm and potentially malicious content. The document body, though heavily obfuscated, contains references to a 'Honda generator eu6500is repair manual', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/aws?utm_term=honda+generator+eu6500is+repair+manual PDF link annotation
    • http://wusodopepufex.66ghz.com/fm_approval_guide.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/what_at_dunkin_donuts_is_keto.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/kindle_4_battery_replacement.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/a_fair_days_work_meaning.pdfIn PDF document text
    • http://najariza.iblogger.org/80020471680.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/99385206724.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/ch_advantage_pro_mat_cutter_blades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxanegerofokox.rf.gd/bevel_gears.pdfIn PDF document text
    • http://romuwoturifitam.epizy.com/7727589164.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/mcgraw_hill_10_act_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/19752543872.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/salvation_army_donation_guide_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/jeliw.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_dff3c5e07c8248e490be58af78d76853.pdf?index=trueIn PDF document text
    • http://medexode.atwebpages.com/2016_amc_12b_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/bejopemaforiverer.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_959be1db2a7d4771a0c3a5392329a3a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gomaxod/zuwejorevorefedizezaxo.pdfIn PDF document text
    • http://livuwiga.rf.gd/xuxeworagidif.pdfIn PDF document text
    • http://xutunivukus.rf.gd/zuvefowuvenuxijorases.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/why_was_the_us_interested_in_latin_america.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/7079503709.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/ask._fm_liker.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 5660 bytes
SHA-256: f32054e9ad54ecb199bb49c65595bc28cfc4d6f1519e59fe2e3e9e9290384273
font_01_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 11364 bytes
SHA-256: ddd6f12727ffdee7494bc15d9302a88ba173bfad5daabb70303d8b08288d0ce5

Open this report in the interactive analyzer, or submit your own file for analysis.