Malicious PDF — malware analysis report

Static analysis result for SHA-256 5754b8714190c46f…

MALICIOUS

PDF

77.6 KB Created: 2021-09-08 13:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8e9452992f4cf6caca0c18efd9c0250a SHA-1: 01eb91e239d3ba56ead138f1f39d3621852a0ea4 SHA-256: 5754b8714190c46f6b0a51fa0c67510f8e2d00cbdb219772dd8c2b93412d1b89
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-severity finding for random URL links and a critical ClamAV detection. The file contains numerous external URIs pointing to potentially malicious content, suggesting it acts as a dropper or redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to deliver further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://tidaksusah.com/contents/files/8772923882.pdf In PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dbabe72f7143acf447cb915751d5eb97/15576273713.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/tevelusasifax.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/kegobaponimoka.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/34733895823.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/63765324276.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/xadiwikuzetobabidis.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/xubotupexudulademovotebe.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/dozij.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/18609872807.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/80403367439.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9a1314e5b010a09bfb62c10060228cfb/65028183036.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/bizoxeratime.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/25053413191.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/sexufewag.pdfIn PDF document text
    • http://ropesadventure.com/d/files/44913096711.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/89578835521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=image+to+pdf+converter+app+for+pcPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 17776 bytes
SHA-256: 2fb1e1215ad86c099e5466c8fed89c1b7eb6565da78f1819ef55b36eb382be13
font_01_sfnt_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 10676 bytes
SHA-256: 5b573ee38910f3a012359b438e84bf68f0b739ddab4de7ae85d82d8c6ef0a576
font_02_sfnt_off00011166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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