Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3eda3c0156ea86…

MALICIOUS

PDF

115.8 KB Created: 2021-07-16 18:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4e09bb927cc286e2076f61c1e3fa446d SHA-1: 5159ab10cee1a6275a5c941b9dad0f5a87f38860 SHA-256: 6c3eda3c0156ea86338fbf8fed9d8851625b3ab125049cc249c3170c7416cf19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely lead to further malicious content or phishing pages, aiming to trick users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608296f232c7d---jozimofudadiwininobepixa.pdf In PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/115b0c545cbc43399e563c70fb6700f6/vurolofixiroju.pdfIn PDF document text
    • http://abpaluso.com/upload/file/85067396072.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/tukininazem.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/wewugodidexunububisu.pdfIn PDF document text
    • http://fittbike.hu/files/file/xufeves.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/86e4434f83bc3d1e475a1895516bc954/tepitowusibuzu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160836259a99d1---82224475245.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/89546679502.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa24979844c---jomugaronagebabere.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/31049082101.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/1d3h4igv1m67h8l34c6bejmof6/71072504008.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/574ea2dee91734d8272fb9035d6b78f9/nopesejofo.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609bde96d6f62---76806722373.pdfIn PDF document text
    • https://proxus.nl/file/58853792188.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bacd21285---gupegupugiwuduvivafikos.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b5e50b94---buwol.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16096103bceddf---20730934124.pdfIn PDF document text
    • https://hirurgija.me//files/47576872302.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/rasipesuvuvir.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/f4mt667ubkhbd4emp1do2hgurr/28508692225.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/eaul9v5g6uqfs4te6j7c1fnu9t/wegekusunimim.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/73926990599.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/252c4c2a1c6722a045df3328d15037c8/74144434332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=bill+nye+answers+questionsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17970 10600 bytes
SHA-256: f3f66049a8d0636d24f195ce73b5c7b8eb068400cf1808e949f7680f4069ab12
font_02_sfnt_off000191e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191E3 18192 bytes
SHA-256: ce597459d2ae40befd113afd8a4797e1ad84d4eecec78a0d331e0b1235563b38

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