Malicious PDF — malware analysis report

Static analysis result for SHA-256 181acf6f4f74c5db…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 12:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8bb96db5e4b5f78c8f439336718f7528 SHA-1: 592bc4d7534dd10afa95261ddc0e7bbabe4fef3e SHA-256: 181acf6f4f74c5db197b0ee6966374221de69c3edd5f61ede4190ffeb81e6a56
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The presence of numerous links on disposable hosting and compromised CMS upload storage indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://scuderieverdina.it/scuderia/userfiles/file/44386122302.pdf In PDF document text
    • https://infrastone.com/userfiles/files/7447885120.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/dipedalizidutorasora.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b2dfc1c6ab1e82f7a3741e08b4b8fda3/29047885421.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/14546135745.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/viximetelagutijefara.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/85186501176.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/pusolavexurerisejun.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/21766047260.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd09d4eea---55752227540.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a15661be8---komiwejapi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16112c38a93e8f---tunubewesipajamizakokum.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ae25b909---60919737734.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9aacf459a1c86dc401492f7bac8f292d/79513726882.pdfIn PDF document text
    • https://ferropula.hr/files/38143983449.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c334d076ed0---biniwipok.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/wamobupugarovute.pdfIn PDF document text
    • https://drsoleimani.ir/userfiles/file/66298379993.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/lelonakivakatowipa.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/xamozovuwisedewumesevus.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/wijajigobakepiwewikomom.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/dudopexatapitujelekut.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/fd0f2e7bb791b755344c06d821d4aeb1/fufixileraxakagegekar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=largest+boat+ever+builtPDF 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_off0000dedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 18156 bytes
SHA-256: d43bf619f52d122aa38f7ffae5234ff38121a2aca9662bde046aafb16becf792
font_02_sfnt_off0001259a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259A 10440 bytes
SHA-256: e73485f9c4e892cbd3d2ff86e1e3ed661fd20140f67dba875230568f61448e4a

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