Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa3eb58dff5869e…

MALICIOUS

PDF

73.7 KB Created: 2021-09-13 22:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 28de3ca46e9b3a8435bd464d01731a6c SHA-1: 0ea154469bccce5657b36fd813c7f5edd21cb1a8 SHA-256: baa3eb58dff5869e387684c9ab5b0430d6847edc30fd1cc5293eeea18a3100b3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URIs pointing to external sites, some of which are raw IP addresses, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links indicate it is likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=kannum+kannum+kollaiyadithaal+isaimini PDF link annotation
    • http://another-partner.morefriendship.com/upload/files/jiragesigutamulim.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/sonavelaxarokotupix.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/ratawofaxumo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6210971d00bf685b8897f28a234bb11c/muvamodidogaweforisazuzik.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/65163156314.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/gevag.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/kegofirefa.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/zutanigopepiwizanuvun.pdfIn PDF document text
    • https://linker.tw/files/52772484307.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/turenerutigebetafazofi.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/jiwezugaberevejim.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/99388788393.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/lepatidujebana.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/24831893127.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/60831505948.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/xejazironibelagig.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/54202783696.pdfPDF link annotation
    • https://esterkins.de/ckfinder/userfiles/files/92581524451.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/58223415224.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/47031243169.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109131028208006.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161374090243d4---89203986546.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/47667205396.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/85544462332.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109091009029966.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/37488439684.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_off0000bc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC74 10580 bytes
SHA-256: 490135c21b9ada628e50ef22f87e8271818d926460d3969deccbd5f14951e9bf
font_01_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 17232 bytes
SHA-256: e828e47d919078d997f5c77d5ceed1fb9606ff1cc3d53f8288505733eec1193b
font_02_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1