Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d05db351d8e8a4…

MALICIOUS

PDF

75.4 KB Created: 2021-03-22 09:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7852c3f998be0adcaffa4c3429e5c31a SHA-1: 4c957173668a17cf5f8604c0ea27b70e1ca8815f SHA-256: 11d05db351d8e8a4851ccf943d053bb4513eb312cb670333e368ccc57488e495
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it is designed to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/123?utm_term=sarracenia+rubra+ancestral+form PDF link annotation
    • http://pajuwepubawip.sportsontheweb.net/mulovepimusozerikevo.pdfIn PDF document text
    • http://janusadow.mygamesonline.org/2365510248.pdfIn PDF document text
    • http://gugibugud.mygamesonline.org/soft_skills_interview_questions.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/d18e4e8.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/bonita_bpm_tutorial.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/landslide_chords.pdfIn PDF document text
    • https://jexewibovagajuk.weebly.com/uploads/1/3/4/4/134485971/zafanuzejubuwof.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/wajah_bandung_tempo_doeloe.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/timerotomodedolola.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/78831570980.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/numakazogubusotimovujetif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_68306ddf76ab4fe5bc696444a855a603.pdf?index=trueIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_8b2f22a507ce4bad981239963262f1ae.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_3371af8e7b884935ae750049003caf31.pdf?index=trueIn PDF document text
    • http://noxukimu.myartsonline.com/72813088272.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_5141dfef026f4d1998487ecdd5804553.pdf?index=trueIn PDF document text
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_2cf98e7c4730409f8bf236cdaf7cad1f.pdf?index=trueIn PDF document text
    • http://dirulibas.onlinewebshop.net/cholesterol_lowering_foods_chart.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/fesusazojelomileg.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5272 bytes
SHA-256: 50829a9cbc0b0ca2bfd488293bfe190ee7c898ef62d4ffa91786e8bf7a151059
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 10696 bytes
SHA-256: 67d2aea46aaf590039c79ef079b269a5cb22fb87398e1fb53b9947d58679974e

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