Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f96ab3c9dfefa1b…

MALICIOUS

PDF

80.9 KB Created: 2021-09-12 22:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1282db71a7ec4a92cc967a2ef2b19680 SHA-1: 828e9b5ee21fb69e6eacb7f8aa1b143e67f2fd98 SHA-256: 1f96ab3c9dfefa1be96394c7e83a86961426c975de0b8f7074170a9c5e19f7fe
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The 'SE_SECURITY_BYPASS' heuristic indicates the document instructs the user to disable antivirus software, a common tactic for malware to evade detection. The numerous embedded URLs suggest a link farm designed to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://sayurhijau.com/contents/files/pafunadufilu.pdf In PDF document text
    • http://sozopolihills.com/userfiles/file/78138265534.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/wuger.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/tixotejopevegej.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210912031018_1911252506.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/muvokinosajegunogazabofa.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/7d3436144c89f51cfc01a7dc3590fd46/47581609259.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/pezabusoges.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/35832793838.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/61684371964.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/bodivokovonedivupudafuw.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///lesawagasuziruv.pdfIn PDF document text
    • https://flyags.com/editorResources/file///48992495906.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/xoxagajokejadaguneku.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/fajemogumeremanutol.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/79495660557.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/46792589597.pdfIn PDF document text
    • http://gibisch.biz/files/files/wisenetobazitewijore.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/4259563300.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/61252383346.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/pisadokaliduzabejo.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/33504448217.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210906_6403D1E08AFA2D13.pdfIn PDF document text
    • http://restavracia02.com/userfiles/file/36820340159.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/5015583592f4a5a006b72ad4e453b9ff/fejojuwetew.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/wogowegosepuzi.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/wazuxisin.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/68747460926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=kgb+file+extractor+for+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 10716 bytes
SHA-256: 886b8037303ec9eba18d9411202c11afb05ce98ac8416092f0ede376b5e91894
font_01_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 19124 bytes
SHA-256: 6ca77a67aa06a42c53274e8b9694665995b67917a4ebd7b8370640699d58fab6
font_02_sfnt_off00011db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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