Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a243724769858d3…

MALICIOUS

PDF

67.6 KB Created: 2021-03-19 18:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c49b2ba513231c28117089aa5b34e840 SHA-1: d5e685ae8d8128737af9da094faf4c4110024be5 SHA-256: 3a243724769858d3b6ba43ffb54a5da9460780b1800a0dc8db0671d244139773
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although the document body is heavily obfuscated, the presence of external URIs and link farm heuristics points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7833

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=fanuc+18+t+operator+manual
    • http://midopan.iblogger.org/dajepuwovalagapum.pdf
    • https://datagoso.weebly.com/uploads/1/3/4/7/134718767/kabomanuki_difarojiwetelik_tumeziparopanal.pdf
    • http://zusiwibewire.mypressonline.com/z_table_critical_value_calculator.pdf
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/9286645.pdf
    • http://reabook.online/mm1_chinning_guide_osrsknh7e.pdf
    • https://rilopogikumifo.weebly.com/uploads/1/3/4/3/134320310/7878065.pdf
    • https://vawovuwowoxug.weebly.com/uploads/1/3/4/0/134040368/gaseduza.pdf
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/09d55379745b9c3.pdf
    • http://cloudmarket.website/3-_5-_2_attacking_patternsb02t5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_75a1e02b80ed438299652b9b07c530ca.pdf?index=true
    • http://sasuwirakib.rf.gd/rorabebagegaji.pdf
    • https://s3.amazonaws.com/tezude/idea_of_justice_book_price_in_india.pdf
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_89063a0952b745f1ae36705d62c9bbc3.pdf?index=true
    • http://vorasatijede.rf.gd/24003883727.pdf
    • https://s3.amazonaws.com/fukepez/55317839918.pdf
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_17ef436e48e74dae984e80fa61035369.pdf?index=true
    • https://s3.amazonaws.com/gagagakigibapo/crime_reports_west_san_jose.pdf
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_fac4fbd8e9c84ef7b15dd40386264567.pdf?index=true
    • http://maxuluxusit.atwebpages.com/the_absolute_basics_of_the_christian_faith.pdf
    • http://benamow.myartsonline.com/56086900129.pdf
    • http://fusarafabar.epizy.com/8302205043.pdf
    • https://s3.amazonaws.com/meludav/20980340433.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcc.bin
d2cc2fa22f3aca4f2dc6d1dc0da7b54e8401593e74590d2d438dcf9d8201d8ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5104 bytes