Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1655630420124c…

MALICIOUS

PDF

69.3 KB Created: 2021-02-25 15:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 36d8dbb248026dc6bc4b6fffb5f2394b SHA-1: eef74e5d0f10c78f26b849943012888875644e9b SHA-256: 6b1655630420124cdbfc5864ad5cc6e395257eb11b3be17858890ea5d96eeac7
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to setting up a universal remote, which is likely a pretext to direct users to malicious sites. The presence of many disposable hosting links further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

Heuristics 4

  • 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
  • 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://bologen.ru/strik?utm_term=how+to+setup+universal+remote+to+tv+philips PDF link annotation
    • http://50offstore.pro/alimentacion_saludable_definicionu6ugl.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/lefapozizusajesopixen.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/410786759.pdfIn PDF document text
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/df6417.pdfIn PDF document text
    • http://sanasojan.22web.org/953865526.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/where_is_the_defrost_timer_located_on_a_hotpoint_refrigerator.pdfIn PDF document text
    • http://bejegom.22web.org/apache_cordova_android_studio_tutorial.pdfIn PDF document text
    • http://expo-kit.ru/7475968200vpy9f.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/arabic_alphabet_exercises.pdfIn PDF document text
    • http://antonioit.fun/brute_force_affine_cipher_python13f87.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/define_equus_caballus.pdfIn PDF document text
    • http://xumegexujarev.22web.org/helpless_2012_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/zeredijorezipugobon.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/49917467911.pdfIn PDF document text
    • http://zamusokekegu.rf.gd/weather_report_for_memphis.pdfIn PDF document text
    • http://baguselewaz.epizy.com/formal_appreciation_email_sample.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 5172 bytes
SHA-256: e4620236d84f4bee6021693c74bd3f7b83967c62e1f4dc0f623fb88c72948e5f