Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72b0ab954afcc50…

MALICIOUS

PDF

113.0 KB Created: 2021-07-05 07:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bcc475191ac2753889a82b6ee47936fb SHA-1: ed2efd6f11cd70ab600cfe80998aa2411e60be42 SHA-256: e72b0ab954afcc5035b34234c2a86fef33f888985a7c535f44be118394e5134f
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests an attempt to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160739c48da8f1---nakafokazikuxogokusu.pdf In PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9375b3005---doxulapo.pdfIn PDF document text
    • https://spacio.hk/attachment/file/tisomemow.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/83094004648.pdfIn PDF document text
    • https://giustofiori.it/file/vuzojeniguzekipema.pdfIn PDF document text
    • http://premium-h.info/files/files/57475858838.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/wefiw.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097b4ece4844---29655606914.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a3a755bdeb977bd86444ad13201c4e4/pabazitaduvefojukuzi.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/ng6vgm16squh0t116cc6ki01mv/99801068897.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/nosolosuxogujawemoga.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210617015840_1211659342.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e3e3f28190eae5916e54c5d2c9e0d79a/ravikenijasefawo.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97a4ec4ef---zixevulufamenufazate.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10396d56a---81951326853.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/tapis.pdfIn PDF document text
    • https://aedwea.com/upload/foto/zazugafozaxa.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/zubowi.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c4a5d8330---najotoguxulam.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/musaseninujutoru.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a065fb6e800---vakuxagono.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c00d4a08d473dba94b4aaacdeb737c2a/firajuvidanufoxe.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/runukakalododatizoneb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=oldest+but+goodest+musicPDF 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_off00015a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A34 17048 bytes
SHA-256: 931359a13e908ae681e2c2ee48f3b4eebfa4001ade429dc173a1d08e445025c9
font_01_sfnt_off000186d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186D7 10612 bytes
SHA-256: c70dbf3d15efc93c479473f7870518f9476ac0f7cb68d13aaca97b6bbe77f866
font_02_sfnt_off00019ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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