Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb98c022a2f459e…

MALICIOUS

PDF

75.5 KB Created: 2021-09-01 06:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 010a5986d038a0892cc2c2dc80ce7f54 SHA-1: c493fd60f6cc9bdd30615bfe8bac5b66b553386a SHA-256: 0bb98c022a2f459eb840fed42a518a45d031cfca122b9c800e70157b623f0dc5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://mazdooradda.com/userfiles/file/74525943382.pdf In PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/netamewe.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/gotafizopadizenoved.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736bd8d54bd---73998883862.pdfIn PDF document text
    • http://bjjiffy.com/upload/bunelopefejem.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/pixawaf.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/bujinekupal.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5b790f592---nelepuwomagosexoj.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/supelitaminotog.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b62682a71edab73c31a4deaeeca25000/kuridiver.pdfIn PDF document text
    • http://bienbao.org/uploads/files/16906626512.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/91575651798.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9fe4b1d6d---47409613297.pdfIn PDF document text
    • http://go-forum.cn/upload/files/setugoxege.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/f93b5b9a382740b269dd1f6c9933ccfc/lodagozuvojop.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/21349808316.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2753e4a1675a2c251cb311599d32d87d/wunaratomediduxuwugivid.pdfIn PDF document text
    • https://mszukam.pl/dat//file/74266139451.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7c143957f492b8753f3f33715081142c/54663920748.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/ritebogenatapetabetakaxat.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/46606897349.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/191fd0d6cb58b68ccd80d26ba31afc35/81082746014.pdfIn PDF document text
    • http://contactconfiance.com/files/files/14956602929.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/numizojojox.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/vefamawodefumugovex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=daily+challenge+bloons+td+6PDF 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_off0000c2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CE 16736 bytes
SHA-256: 00f0a4f5a040c047e448aa6702bf37a236237646986e3372b240498db176849f
font_01_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 10972 bytes
SHA-256: 9d0e03b9334a9b12ddc2cf4fe8c899b25fcfaff7dc0bae810a27e61d87b2dae6

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