Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1389e03b5c40ec…

MALICIOUS

PDF

69.0 KB Created: 2021-09-11 21:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b36f05cf8227762453b3e1603e627d3c SHA-1: 2e8eb2a69edffeb9a621f7582dbac5e394a7c86c SHA-256: ed1389e03b5c40ec0ea0bb92c3931f727479b321a9bd13419028b1b778c4da73
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to lure users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=aplicacion+android+para+ver+tv+gratis PDF link annotation
    • http://itemclinicchina.com/ckupload/files/36428638180.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/7255150737.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/67682880834.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/munixologokipovapas.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/dagagem.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/katomit.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/38421566649.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210910163835.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/nuwokinurigijofilop.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/sulikevodemarezimud.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/nagibanuxenabisizutuvinos.pdfIn PDF document text
    • https://terracell.info/images/file/ruvufisokozupazixod.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///wibederenemazemajuse.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/ludaxo.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/50337959155.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/kafuwiguvekevipaxoliw.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/9c2da978df9ae474dba6e8295fc34c59/60259219426.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161347fbc79ab1---tevigojirepawodedu.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/64242962062.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/6374275364.pdfIn PDF document text
    • http://wajl.net/img/file/202198115658.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/wivetufudesakizexubawil.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/90476849933.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/ponevi.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://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_off0000b029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB029 15344 bytes
SHA-256: ded1a3adc8773abe1a62f4db8fff9e9dec26a6a83cdd3a8c8d7771e085ae9631
font_01_sfnt_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10736 bytes
SHA-256: 5293e7e88952c68373404215d10867ca425f17fb4e46198e5fc98d9bf53aab67