Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe436e459307c10f…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 01:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e5006df81eb8d682bea970c1f853a594 SHA-1: 92789c01eeee22d465b45622bf16d74cac4585c6 SHA-256: fe436e459307c10fbb5a805dd1a463c08e1579fc93eccd058eeb50eb282c3539
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pistant.ru/uplcv?utm_term=judith+slaying+holofernes+meaning PDF link annotation
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/41693783736.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609105992fef1---11965462741.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210801104125.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/62190372500.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609920d18abd8---tazirogilidaganona.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/57078398755.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/ragug.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082c34036c6e---lijedujamexowogilolokudel.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/vazimadisisetavisezi.pdfIn PDF document text
    • https://zzwgjx.com/d/files/jazireragizizowogeza.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/guboxuso.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121917083f86---84587737059.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62469cf9e---31107770415.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/79232129985.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/34982725568.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/43667386513.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/1064326156.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/60828252694.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/ravirazogopiju.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/zolewagodi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b44bc5ccb---23010195944.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/lujibudunu.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/dabaxuliruxawevaga.pdfIn PDF document text
    • https://dintek.eu/uploads/file/togogi.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_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 18504 bytes
SHA-256: 28015fd5e2c7bdee5979f43938003f630d19f94b5f7eac8fb3073b458f95c994
font_02_sfnt_off00012b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B49 11004 bytes
SHA-256: 03d0652c2e8080e06babff46866b89909e849cb6c63474296c83ffa2ae883d55

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