Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec8fc7ffe6ad6fa…

MALICIOUS

PDF

94.7 KB Created: 2021-06-30 12:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ad5a345941b419fe5b312a5ea5d45fb1 SHA-1: 94f43eb38ff299a6e596b7abe9072b6de4931e72 SHA-256: 1ec8fc7ffe6ad6fa8a0b9c0bef6240c08beae3427a8ef03db7584a5487d26030
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to deliver a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick the user into downloading a password-protected archive, likely to bypass security filters. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=siemens+openstage+15t+manual+portugues PDF link annotation
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/pdm9l7uk78pcnp0bhs5j8gfj53/fejikumif.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f0b84964---12934544529.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/lobisijewasaxa.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/90706663428.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/87f52248e6e17d74f6857bcdec244c67/54213492618.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/edacnr02lg5ea8oghs7fp5i10q/fukujosavineb.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/butefafepoxowavutunug.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/4orl3ounsfmkb6lc48oaerii61/rirawedotovevifatowiruxi.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/12615680061.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/84625354738.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/84013768868.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae938afabd70be548944b3394d316f37/95473301981.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/63232654106.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/wujubirebalexakodifebu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j2vi3r0h1399ht19nq2inltsj4/38255733627.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/26575317889.pdfIn PDF document text
    • http://billsky.ee/files/file/juzorupemuputek.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/wuxawivutemagelag.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c679e556146---35369947367.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/3oelvk83b1bra4isfiaf66lao4/jizex.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/modupizodasewapafowuliji.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/01579ctqpnianoonntdnqhmhu7/37099152353.pdfIn PDF document text
    • http://twinslock.com/ckfinder/userfiles/files/19781501990.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/da1678a38962c1153355f996ea862137/21804586471.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_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 20844 bytes
SHA-256: 11dade87fc6d4c21d5b63268ac8e50d54abe165d446f86183857868f46148db5
font_01_sfnt_off00013a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A36 10956 bytes
SHA-256: acf1c15cd8eeef4a22ac87ebe841ad3c30e74a207f582922a0edeb7c722c0640
font_02_sfnt_off000153ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1