Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac60b3a371ef6ca…

MALICIOUS

PDF

95.5 KB Created: 2021-07-26 13:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f87e341f3cc496072d238b6ced7090c SHA-1: cf51fffcaf98f3b6e6baee9c23bf70b69875350e SHA-256: aac60b3a371ef6ca7987cb48119090e863a00f5282a6d73a096d02e9721b0ff9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The document also functions as a link farm, with numerous URLs pointing to potentially compromised websites, suggesting an attempt to lure users to malicious content. The presence of both embedded scripts and a link farm indicates a multi-stage attack designed for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://dailyiat.com/html_upload/file/zarinu.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608945c29e83b---xazejimafimigesixot.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/dumufu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88a34412a34f0c2c644798f2d0623caf/60665250676.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/4728f6ae0b1a6971cc184a57e68b76bf/novolimulawogof.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9f40dab08ab4a0deaaa016106df06bb6/vixilopofugotubezovanizam.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/gemuluw.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f9459172---wuvukejosemusekekososabi.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///limatubibufulid.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b41bc887368---tatuw.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3e620ef3f---93888986205.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/3al6hpeec3hvt8jsfa1rgpdbmc/kosizifajonamodobozidutu.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/xiragefujon.pdfIn PDF document text
    • http://devison-matras.com/upload/file/15176731281.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849fd32e2cc---88374403071.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/11824661877.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/teburuwugitotijixe.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/26603891928.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/50988601831.pdfIn PDF document text
    • http://aps-mes.com/files/file/kapolataguxinijuwofemed.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edccdea9f92.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c120acec---85735581644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+watch+youtube+on+fitbit+versa+2PDF 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_off00010fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 11044 bytes
SHA-256: c93e374b5ded2e836bbaceb9cc00b4b24e3616988e4f5155d85daf8eb0b5d176
font_01_sfnt_off0001298e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A0 17044 bytes
SHA-256: ddc7b2b46bf2cb9b4ff95ba125f435f174169ec45902d7e02a37c6c4ff53db15

Open this report in the interactive analyzer, or submit your own file for analysis.