Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9198fc2e1327dfb…

MALICIOUS

PDF

124.3 KB Created: 2021-06-13 00:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 009715347bd53ceaa71aa2e4890c688e SHA-1: 3401bfa1e133dd924c77d8b9acf7189d5c0e6324 SHA-256: b9198fc2e1327dfb18d837e05db1380040025b4cf45b0cf68a202d8d0187b2a9
176 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics. The document body, though heavily obfuscated, contains text related to religious practices, likely used to disguise malicious links. Numerous URLs extracted from the document point to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The malformed stream length heuristic also points to potential exploit activity within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 https://inwebjor.ru/uplcv?utm_term=surah+manzil+ka+wazifa PDF link annotation
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160861ca20632e---27353390729.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33019a4546---fowifopitobanede.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bf62939da59---kizojopukuzilezipejijo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16096585930f1b---38851666280.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e56a0743a---94706935214.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4446c504b4bfc4389f0a6e2dee81f4c9/dapuregaluxexi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad674d9f65---mipugibopukikaviruruj.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/desemilimisereb.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/59152935947.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7f655b98242ee997556ca15bd4e755b9/ripaligewunotowulamepa.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/bh9gfaurv281ctpgpobvg8b4j4/bajokejafuna.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/39889516333.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/vinaxokedebarotogo.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d973b62f30---99334949171.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/nefakepavageduvasadap.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/ganemovelozuzilamuzas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001afd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1AFD6 29364 bytes
SHA-256: 986b424225df3e2507e655ad6d869727ba173b281b4bcd3efbda1810af00eeef
font_00_sfnt_off00017a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A3C 5136 bytes
SHA-256: 8b0c2cbcc82f19b85697f82e54abf02680a46e5346bc55a0e6e8dd6091b8a842
font_01_sfnt_off00018ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BA5 10596 bytes
SHA-256: 3bbbd569bb6e95a5aba6456adcfda885a9e1c2210b711a516095641d39ae8d0e

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