Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dedcac29c2252da…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 21:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 605f903bd451bb51dba460604cfecd2f SHA-1: 14f1b4c853872f41f61b97fd8c7b9b9cc90876af SHA-256: 0dedcac29c2252da972e95e5cb5903afc90576c97b62592d90922a7d5a7ba949
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://infrive.ru/uplcv?utm_term=iphone+6a+price+in+bangladesh PDF link annotation
    • http://fogathajtohirek.hu/fckfiles/file/44816418965.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/65875756128.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/niwisaxirirezoko.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/11546470561.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/vifadojibuwurogigonelis.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/35390745441.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/rudajegovasakupuv.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/pulujenufadeke.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/satujakepaxavoto.pdfIn PDF document text
    • http://leton.pl/userfiles/file/wifunotikiwov.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/mejov.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/xowipolegikinuxabetolazut.pdfIn PDF document text
    • http://artospace.com/pics/file/dowalik.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/73519780598.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bff8f48ee17ef530160d2f7bc11f6ab4/91756957717.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fd067208a---komubilakodit.pdfIn PDF document text
    • http://polletnv.be/uploads/files/bevevidig.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16134b0ae9da47---misetefamerewedis.pdfIn PDF document text
    • https://ijp2.com/contents/files/kevojexepexudude.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/4090376821.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/filoxegewugegarunerevi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613748fc91e58---94333168605.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/16216819574.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/6h7f4idgf6i9qeh1uhv108itg0/basulokomi.pdfIn PDF document text
    • 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_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 16752 bytes
SHA-256: 9e31c5398467def734b92b5a8b186695cb5515d4b91c927ccc933ae5ef8249bb
font_02_sfnt_off00012013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12013 10956 bytes
SHA-256: 8cff068f2e0c46ca8e615af549bea86fa7da92adc11f35a72120dfeeb120bc87

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