Malicious PDF — malware analysis report

Static analysis result for SHA-256 80744b7f50f01e30…

MALICIOUS

PDF

84.6 KB Created: 2021-09-02 00:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c0e1919673c6bbba02fff6362c19572c SHA-1: 8f9aa712a5c9fe561b02a62977049629ba1d6ff8 SHA-256: 80744b7f50f01e306616b5e1e89ca1e1c281dba3ea59d5583e9b0ca76d860450
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of links pointing to compromised websites, suggesting it functions as a lure to download further malicious content. The primary attack pattern involves a link farm hosted on disposable or compromised domains, aiming to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/dexagufobekapamirodex.pdf In PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0bf9fbbd687f72981b93fb1aa686d03c/pazuribakumuwu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbea47e788---18890971616.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/gusuderinefomozajomufefak.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/18188818248.pdfIn PDF document text
    • http://benefielddarrenfordhicksunited.com/clients/2/21/2186b72972973349411f8b90e6071e14/File/1346931597.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/15635008612.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/8856db36b6770ef024bd0edc7cfc9ca7/94552801507.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/wajunedubud.pdfIn PDF document text
    • http://allycatering.com/userfiles/95704743913.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071c47a7f461---dijedofanuraduxo.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/penafokepedifotukiwoleve.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/siwavopotelijutazujuxafez.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/rjtghml9m3gpevcd052r00dv7f/59106258711.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/dilirixalibafudubetupa.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/qp5e0cc76fasusr9nutrul9kp2/38751228677.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/berovama.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09e568723---rasaludawagemafoxa.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/35757236764.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/fumofiputiwizege.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/xazasomuwunorabukedosekom.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/44940752498.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a412a7dd357---nemugoxev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=great+dialogues+of+plato+pdfPDF 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_off0000e647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE647 17156 bytes
SHA-256: a61392192ae2b49092a6f7d4744e8b105706546bc1b41f521996af95d8cce346
font_01_sfnt_off00011284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11284 10708 bytes
SHA-256: e6b352345819bc75cfcf09eeec2b7eb4d4f0bf9b0ada00ba84eb1ded3e19e038
font_02_sfnt_off00012b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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