Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede63c96b2a46274…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 09:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 839471226a10a1fd522d0f76575667ac SHA-1: cf68bb8acc7e4640df609af1f548c1c5157f1948 SHA-256: ede63c96b2a46274723bf4111760e1ccedfd74d2d11b680d77a5c7ccda691481
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. The presence of a raw IP address in one URL further suggests malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the phishing and potential trojan delivery nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gwardiajuvenia.pl/zdjecia/fck/file/17423171102.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160baae76b5652---32850331090.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/20a534cca4385a63604163200f022407/5585707137.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/m405srd2toqvedt34abuu97in1/dowuwowugalatekesewexig.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210619_3BF811D807D07E0A.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/579c5eb9311b3c179167c4a6dcdb988d/98890805211.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/309168a27b3f68f945bee33916e681b6/96509080153.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tegvj3lu3152fv9dnepjkkcd48/nololemilitugaputefago.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a14f5cecdc8---95850277262.pdfIn PDF document text
    • http://iwishop.hu/file/26637065040.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1a61a9ca---dobividapoxixafatanesi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/orprb1istovpk4c7qn4hqig0a4/38369069820.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/gerivununo.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/14cbe4c48ea0d19251c09efbf514c51c/senug.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c43d67b0b13---87316422584.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7f66d304---54173332945.pdfPDF link annotation
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ee838ec2492acafbb3a4bc2a540b8263/luzezumawifirilotemudem.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/793aaefb231f3877bdfe951204e4cec7/37693139458.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/munomijepuvivebafadi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/68dbc2e7e27108f6bccf332ade52eb69/kaniwewemakimurom.pdfIn PDF document text
    • http://ekotronic.eu/files/file/99659835489.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/75545178606.pdfIn PDF document text
    • http://allycatering.com/userfiles/watikalomafa.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a31c9cac0---lagidubuxave.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/j5ii2l95nmkjvpqp4r19hd0ac6/sosaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=be+certain+ofPDF 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_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 10168 bytes
SHA-256: aac8ed2ebe66d71eeecbebd5a77ff66e00f3e1fb18446095b04c97fb4c4d4251
font_01_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C93 19140 bytes
SHA-256: 3df910660de196b9e2a94009113c272763880a255fa81c5cf1e6648d0213b6c5

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