PDF malware analysis — malicious · 256f9e321dd4f749

MALICIOUS

PDF

255.9 KB Created: 2021-08-13 08:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: c380f6153af98e949407111c9a7a63df SHA-1: 7151e6782f73c8877b31306e4e015ae7dcf65ee2 SHA-256: 256f9e321dd4f7499d9c29402f6559b5855ff2a13de563d4833bd3c16ade636c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links indicate a likely phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.8217

Heuristics 5

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.
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://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160dc0265d649b---27178254772.pdf In PDF document text
- http://bsa-billiard.by/images_from_html_editor/file/fajubikafadom.pdfIn PDF document text
- http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/75743550627.pdfIn PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/51965da71aa00078dccfe3ac831643a1/28155551214.pdfIn PDF document text
- http://suarezbeltran.com/aym_images/files/dirogariwoko.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/9fd1ajrd06ng76trmp0t1l5end/sasolejopav.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b20c1343fd---55019209571.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/sv89bvalmqh4fgk04rtjgrhioq/48777948785.pdfIn PDF document text
- http://nessium.fr/userfiles/file/musezagesetodurilik.pdfIn PDF document text
- http://svx.su/ffile/file/guxulanurewarujopixididu.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e3d6a1cf8---folowiwonofimasijakuvek.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/1f1f2eb96411040de34bd3b62f9388b8/91907301860.pdfIn PDF document text
- https://ridersshop.it/file/54075277896.pdfIn PDF document text
- https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/40238619913.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/9da59e699189ef96941be3991a231413/24574651396.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6811e0f7---85944778073.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2176c4cd4f---78017125408.pdfIn PDF document text
- https://biholka.cz/uploades/userfiles/file/musojawe.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5ffbea0c1---32984492106.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/89828020993.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/003a5202281e68e87cfd8e90ea492898/bawevopukavonojavira.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcaf7a7cb3---10123929544.pdfIn PDF document text
- http://burattinojatek.hu/userfiles/file/12312579475.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608c11b510685---tuwopuvij.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gs6hcpuqqfnbm0082ba1j033sv/fivosupukuvopi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pocket+guide+to+public+speaking+6th+edition+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00037664.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x37664	11300 bytes
SHA-256: `86614d76caf56f6c491945bab4c775eeecf73e6d2503fb344fc2ed4c016a5667`
`font_01_sfnt_off00039081.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x39081	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0003a892.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3A892	16076 bytes
SHA-256: `0491ab1f9781984131449868ed95f15036bddabad70a51597ae233fa8bdf08d0`
`font_03_sfnt_off0003bdb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3BDB5	18676 bytes
SHA-256: `4b2bf7bacbb27d71408e9d540fc76fdfa2d539adf74aeb450bd9f50ff08f6df4`

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