Malicious PDF — malware analysis report

Static analysis result for SHA-256 b393127d63822984…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 17:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 45afc20e5ef0faebf12c16dadf4e82fb SHA-1: f56a486d4f855c4e7cc182d1fcb27fb14aad05db SHA-256: b393127d6382298455ed65ae2f718456ae6381c8f2cd7c9388bf7de892fcd1fe
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to various websites, likely intended to deceive users into visiting compromised or malicious domains. The presence of multiple external URIs and link farm indicators suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://inwebjor.ru/uplcv?utm_term=jetpack+cheat+san+andreas+pc PDF link annotation
    • http://meyergarden.com/ckfinder/userfiles/files/kezowovurenuwakexaxu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ag21jcsfr6brpgesd47g19kof1/33668510938.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1lt75lpusqunfe1jnjkrd2vkn0/misovixojulamilojebek.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/gixoxuvepomatituwizox.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/duwexujudutaxaxedu.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/64258628152.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/jovuvebakaxomomako.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0ce49b845---27301291653.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109060034423206.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613187f55c6a4---supululur.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/58892668507.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/pepidepipalalobagovena.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/migebite.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/20975860233.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/kadapiwoliluliwefuve.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/xesamuragopalutu.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/vevajikurowimifopibiw.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/74055723546.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/37706144742.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/91683243073.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/patapolefijutajatew.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bf850a721---67652729450.pdfIn PDF document text
    • http://classtool.info/upload/files/39535073102.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 10436 bytes
SHA-256: 622376acba57ceab19f9e0332eecc26d0ce404f56580db02ce065a0c42f88fce
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 17424 bytes
SHA-256: 426c7915fcfe5670d95535810f4d14f8b655863e778c620684806fcd2132c534
font_02_sfnt_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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