Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30ab04273a7b9f9…

MALICIOUS

PDF

83.0 KB Created: 2021-09-02 06:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eab9045764038976a56a8e06c03dc6ff SHA-1: 48065ab05542832e6a3b5283c9dc67c9e601bd01 SHA-256: b30ab04273a7b9f95a52eb2e5cad0337e678c531413404062c65404f83b0a8a0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure itself does not contain readable content, but the associated heuristics and URLs point to a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/el8jf4t418c1ni6ccvcup51gm2/24110733877.pdf
    • https://eghamatyab.com/basefile/bainbookcom/files/53035548103.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/129b48e12fa60fe8a3f0f6dbf8563128/mudapirekavimu.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e6a65ee16b76522bc60f0a9360e91874/6525041383.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-8-24/20210824221811203108.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/srsr4dfbi0jff441rchltpgob7/30382651887.pdf
    • https://bwawarszawa.pl/upload/file/14207247442.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/bomosumolipit.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f40c77d9ba---kotuji.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ih565j7umsqk9j3vsemaom08mr/megetawezokokovejo.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d9c670638958b8684ee3d3de7ca61359/rixitidulasagavozewowi.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acff270fc72---rarivisidi.pdf
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1627863321_11fbddce83.pdf
    • http://geredekombiservisi.com/userfiles/file/togafibomis.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/d2e1420a0c10eeecd5e45d67d4fbbb1e/1267728238.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/bf600cf3df3dab0299416bcad3c6a27d/33555656964.pdf
    • http://sinice-rasy.cz/files/file/72074371732.pdf
    • https://mobile-translator.eu/app/webroot/media/files/kojupogogowoxenakiso.pdf
    • http://bendhorseride.com/userfiles/file/11247232061.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6167e039b2---rodikekuz.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/ea4eafaff01e4e58a1a1ece3393e67ff/kizomifikuku.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7bbe6559bcbb92acedafde893a496aee/41875940667.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/cc9e25d56e542b6b1408fae5fffc24d3/sazugunisekaxogajej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=do+vegetarians+eat+eggs+and+dairy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd56.bin
f88ca3edca364aaf634a8e69d6099fb240a6d61330226165ef1f153991820e85
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 18352 bytes
font_01_sfnt_off00010d2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2A 16792 bytes
font_02_sfnt_off00012541.bin
584e53dc636d95f96d590e8572a1a3556b66a9d0aa19afd9aff80bfd8209677b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12541 10556 bytes