Malicious PDF — malware analysis report

Static analysis result for SHA-256 5617301af733e47b…

MALICIOUS

PDF

105.1 KB Created: 2021-05-03 05:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 118f75ab1ba7569017224e5774738bca SHA-1: 05d68cbb5c725df22c13dd2751c5b6c9bbd48c29 SHA-256: 5617301af733e47b5aa06c0c8052cb28e181655ad105f2b19207146ed9f1d54a
126 Risk Score

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 contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a likely attempt to redirect users to malicious sites. The presence of 'utm_term' parameters suggests tracking or campaign-specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=sri+lakshmi+ashtothram+telugu+mp3 PDF link annotation
    • http://copyrightsupportforlnstagram.com/kohler_20kw_generator_owners_manuale17um.pdfIn PDF document text
    • http://gamedv.design/nfl_cheerleader_porn20p0y.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/download_acrobat_reader_for_files.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/maxazoj-dokofo-kunalazobiti-kazomured.pdfIn PDF document text
    • http://jokebixa.22web.org/logobibalopexojimolojiw.pdfIn PDF document text
    • http://remont-pc.website/99239086065sdafc.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/navibamesevi.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/73914218115.pdfIn PDF document text
    • http://unreguezff.rest/6.0_powerstroke_oil_cooler_housing7fwt3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd4dbde-26bd-4ed7-86de-d9c356af2610/arithmetic_problems_with_solutions.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_06594075bbfe44b88975c5458ca3ffdb.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_6f4cf0da2d08425a98cf92ef1c5f5c6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfcd6aa-2dc2-408c-b727-ba37e3929e00/zibesupewuragufogivise.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/suvaninujoboguvukusa.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_89063a0952b745f1ae36705d62c9bbc3.pdf?index=trueIn PDF document text
    • http://linanimeb.rf.gd/15182252357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d555b3a9-df18-42d3-a726-9e6b48a9b3bb/folaluxomebonap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca12a8c-a194-4bf1-b3f6-7b33ff77b4eb/kali_linux_nethunter_app_for_android.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 5564 bytes
SHA-256: d01c012cc11ef08b8faf216c65d3c54082d4cd6d6bb5b95c2659cf1225186bac
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_02_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_03_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 45564 bytes
SHA-256: 2cb3c2f24e9a95ecc455483866dad461d3ed03d92b7db832b8c6917dd07ca762
font_04_sfnt_off0001661f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1661F 10300 bytes
SHA-256: 8dbef30c57e48a3a655dbb846fddc74b8dd25dd9bbcf4fc489ab172e7303667e
font_05_sfnt_off000189d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189D0 2960 bytes
SHA-256: dcac78942f1440f70ce5fd3d5d1f5424ae63e9a52909d07d73fa78dad1c37027