Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df0f1ce90f34efe…

MALICIOUS

PDF

85.2 KB Created: 2021-09-09 09:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dc2f24f652723ecef27c6c78d6cc03d9 SHA-1: e2d9bb34e612adca12aac5214c08702dbae1fe1e SHA-256: 2df0f1ce90f34efe846ad8f527e7e4aa891cc6b11ca42f4761fba2cc7e9eaf23
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to other PDF files. This suggests the document is part of a phishing or malware distribution campaign, likely using the embedded JavaScript to initiate further malicious actions or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://s8radziejowice-paszkow.pl/userfiles/file/40711457702.pdf In PDF document text
    • http://retailcop.ca/files/52829556767.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/nawanajigugud.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/mudapaki.pdfIn PDF document text
    • http://lejuriste.ru/files/file/67769579722.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/lofesegugubosak.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/49778974179.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/88422284558.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/75649216818.pdfIn PDF document text
    • http://synhbio.com/upload/files/16585651075.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/nedogunawoneravodej.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/59047711086.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/jevodago.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/gabekawowut.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/wavalimakilidixeju.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/didelanosijefazanelojobi.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/tugadutajuwuxowawajag.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/mibatapovuzoxitikerife.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/guxolijavozuxurufoganok.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138c8d0c58ce---21170522765.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/rowalifimedubajovanifezu.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/sajikomixeliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mobile+legends+senki+offlinePDF 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_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 17100 bytes
SHA-256: a789ee01424a7831d3b0857e153634fa9dbeb136e20a5207a41f6630971d9588
font_01_sfnt_off00011815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302C 10396 bytes
SHA-256: 46afe6f3459e986f6b8e9c05cdefddffd692b142e8d524ca6cea233ab6eeb8c3

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