Malicious PDF — malware analysis report

Static analysis result for SHA-256 412e43260ab716ed…

MALICIOUS

PDF

81.2 KB Created: 2021-10-05 00:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 60874527165fda99b790b4b64f6a9965 SHA-1: 22a4af27f5bcb0181a2ecb4ad1c2a75bd0877ebe SHA-256: 412e43260ab716ede462f7740d80ec969f355bb28e83d5e88b2e0987035173a5
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristic 'SE_INVOICE_LURE' suggests a phishing or scam pretext, likely aiming to trick the user into interacting with the malicious content. The presence of numerous external URIs, many of which are unknown, further supports the idea that this PDF is part of a larger malicious infrastructure designed to redirect users to harmful sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dep14kirov.ru/userfiles/file/41818066538.pdf In PDF document text
    • http://zulassungsservice4you.de/bilder/file/putelavejugife.pdfIn PDF document text
    • https://fobh.net/userfiles/files/97198091833.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/sinaposojazu.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/25895841583.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/6846602970.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/f2bd3157c0b8f387a0a88402ec9b69cf/50064214197.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/jevogil.pdfIn PDF document text
    • https://cmf8.ir/data/file/babadopasa.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/49183491553.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/6114058629.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/wagozojowofojetelajel.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/31789909308.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/kezowuri.pdfIn PDF document text
    • http://meteoratourismactivities.com/files/files/wikuxuridalisidivudeg.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/5761804400.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/sefarajug.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/38073231248.pdfIn PDF document text
    • http://cataga.de/beta/files/file/56370246281.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/jotupu.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/jupagumogovebof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=19+hour+fastPDF 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_off0000d87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 18508 bytes
SHA-256: 7b6f9ebce3ed17a776d94972f33912b6e80689a4397a3a526a951b7054e9a933
font_02_sfnt_off00012131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12131 10160 bytes
SHA-256: fac4fe904ae3bd11fa5cd12644855b7d3ae33893eabf58e87c4feb79b388d836