Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a95c0f32540985…

MALICIOUS

PDF

97.1 KB Created: 2021-09-06 10:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6f85bec7432b296ce27b0d9bb75ba6ee SHA-1: b95db2ba11e94cbd55e0c7b3139c655f12529933 SHA-256: 62a95c0f325409856ff7c4bd812789b43620f767aca81ae2630303ca3c37783c
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating an attempt to redirect the user. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the file suggests it was delivered as an attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chptravel.ir/data/file/selatapoda.pdf In PDF document text
    • https://pacantioquia.org/aym_image/files/33552590874.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/xubusololazureborajefawif.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d180bf384---15861041722.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/31895976654.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/79339498291.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/60115292601.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/bbbfa6.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/zenefufeki.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160873b3706c47---mazukoganemubasaxukes.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16116fc043b708---fobozewabalafopigiduzoko.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/9c8mgn2vmdp9etrebk2rf10o80/68031496229.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/70320486287.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/45209166966.pdfIn PDF document text
    • http://hidropro.hu/upload/towowofusidafojabel.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c241b1ec6a3d3196fdd984c3cc27b862/68206315705.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/fatutagugerijanikozopi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0baedb972---43428404150.pdfPDF link annotation
    • http://thaide.org/userfiles/file/vetebuwedifidavavumijut.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ketadl0r1sb5bm675i7jo70ov9/gepadoziwakunofawutimoz.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ofl2ascucb0qd2680knkha96i0/gitezusanixeboku.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611565cbacf69---86296102977.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/36415211696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=past+continuous+tense+worksheets+for+grade+6PDF 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_off000112e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E6 11156 bytes
SHA-256: 63e588728e961d867c38a1d71e7b0e784cc2fd9f4f11884252a9d259690a5761
font_01_sfnt_off00012cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDA 18824 bytes
SHA-256: 1ef419c4158fc08de096adc767b5ddd321bd5e720db5a6f1007ed5d65616f5d5
font_02_sfnt_off00015e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1