Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8e3e0d93bc255d…

MALICIOUS

PDF

75.1 KB Created: 2021-10-12 05:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2fd4960191de11898f2fbfcb9eecea54 SHA-1: 9e601aff254df86b161ab42a0cb1680edf7e1c3e SHA-256: 1a8e3e0d93bc255de2c4269caabf655c91c23947fb98690f9b0db2b6bc4f4221
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting it's used to distribute further malware or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://www.channeloflove.com/ckfinder/userfiles/files/58642381569.pdf In PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/91661870045.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/pufur.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/59311602051.pdfIn PDF document text
    • http://visoda.lt/ckfinder/userfiles/files/vukigabigoxujelukolem.pdfIn PDF document text
    • https://attack.lt/images/files/pupexu.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/47700337982.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a60517665f---giwegekuwukol.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16153a163db50d---josiz.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/pazodajugubuxewuwufeloxak.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/worikazuzedusopof.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/26486053164.pdfIn PDF document text
    • http://hadt.vn/upload/files/gejatetubewetevibupas.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/12812090227.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/60270973096.pdfIn PDF document text
    • http://kurtoglumob.com/upload/file/19537012856.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/64223344498.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/fiwuguvaxuwodo.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/robevuvibedi.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16148dd7412576---dusunomojolalatugemibo.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210925105202.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/lititidesezakekubovep.pdfIn PDF document text
    • http://indexone.ru/upload/file/vesikimexamoresufekazuz.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614175b69ef21---21811482021.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=express+reservation+in+real+estatePDF 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_off0000c1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A1 17648 bytes
SHA-256: d06603a69d3879ed234dff8b967dcfcbad44ce44e78138d26e513cea226e022f
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 10396 bytes
SHA-256: 54cd5f66292da4155e1ff0f92fe8428f48f4e6bfd84b8040153c72d6018132fc
font_02_sfnt_off0001069e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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