Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda8c189ca891245…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 07:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ede00b193118ea2b162e76e73fc6bf2 SHA-1: 2abf8b99a54331d1eef3b8bbced54a6eb1c50dde SHA-256: eda8c189ca8912458d74290530a2e65e58d7a19664d31c77fe08b991c9ef18fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, with several heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via the embedded links. The presence of JavaScript points to potential exploitation or further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://dotacjedlaoze.pl/userfiles/file/7159509566.pdf In PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/57305269365.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/75028965449.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/zoruniborebavuruf.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/lesilanubalexi.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/roxetutuga.pdfIn PDF document text
    • http://atek-ent.com/upload/file/91269345297.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/lipadikanarugutagut.pdfIn PDF document text
    • http://chinalabware.es/d/files/99762840050.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/161408f999ad37---kokuzizunogogebefawav.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/kufisofagukosejo.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/5046786843.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/56647247185.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/37931746345.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613b473dd7ff3---84151137970.pdfPDF link annotation
    • https://jamisonfurnace.ca/userfiles/files/62881124711.pdfIn PDF document text
    • http://vitcongiong.com/uploads/files/fidemonar.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/fivitebusuxenige.pdfIn PDF document text
    • http://koutingchina.com/upload/files/8292686050.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/16/rolazugemomidizuwuvogipum.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/gebaruwamu.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a42ce767b---nemujenepekasad.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/sulekokobatenafadepuvovi.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/lolalevusedusijapipuba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=facebook+messenger+turn+off+chat+headsPDF 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_off0000b2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 17628 bytes
SHA-256: 845a193d20a8e7bb5d3eb8da84f25693285f8f408667cc5679b00e31b9ea321c
font_02_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 11092 bytes
SHA-256: 06d11d95ee641d6451320d912c26910f6c15484ebf6f737d45ee6bb0929fbf35