Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8ed4d90eba3959…

MALICIOUS

PDF

85.2 KB Created: 2021-07-01 10:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec23126c4051b7cde391ce2cb234bf24 SHA-1: 153abe1536a7c043f314d4508ccc59ed4935ee8c SHA-256: 0e8ed4d90eba395951c321d039213cfad39d17277bfa8bd6ccce96de82abdd12
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The presence of numerous PDF links on disposable hosting further supports a malicious intent, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jmvbla6n6a398jnc7ja3njlor5/mivokodizuziwalujotir.pdf In PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/de58b9f31beda6703abe773d4af0c354/jorukosoxuxato.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/kiwiwof.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/17638408871.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4sdssg1gkg6hl2ktg1u6h60ab4/lipuzaxalejejuzafojol.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/85355627b758c45902b76433fdcf4d1a/59130528141.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/15152694795.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/pemune.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/mederasalomosonosavufu.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7cda1483b159f48d51887c5dbf612f04/85159993819.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kigakarudasabare.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0571385a1---jonaxikagipo.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/310850474575.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/23665227856.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d89486df0a296a915957303d2c35d4f/28625404294.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/14846806707.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/db4c3618abc0395d91426e5cd71e0a5f/xusofusixeminugilikimu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/cba118333f599b06e0a7fac47e1dacc9/41266866545.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/dokasinotikorovu.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/59682b1eaeb10fd0527d3f9e0e12d0f5/86198186506.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0a4a413f0ba711184e89516e34a88f75/sukifasuzu.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/55478626149.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27445561d---lixanozuja.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f7691cf7436dcd94b971884298fdf762/58940023986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=example+of+lean+canvasPDF 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_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 17168 bytes
SHA-256: b2abcfe17c27771c1e4b7a5b298ab911a7444ceea59ece1878d594003c3d5697
font_01_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 10500 bytes
SHA-256: a708a142727e389b0808a9e7d9272ba0dddcc412c9980356f31afcf4f0722bb4
font_02_sfnt_off00012f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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