Malicious PDF — malware analysis report

Static analysis result for SHA-256 972332621804beba…

MALICIOUS

PDF

72.8 KB Created: 2021-09-03 07:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e48393c03166be17442cd440ba81f4c2 SHA-1: fd87eeb5e6a161ebe3668cedb758835cc71e578a SHA-256: 972332621804beba0e329185b6b9278f0e33d477fd93b251a377e30efba54b9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised CMS upload locations and disposable hosting sites, likely to deliver a second-stage payload. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://noelex22.org/userfiles/file/mukegarugikijidopatifo.pdf In PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/e76ee97f77188f46663b5e35119e687d/gijirefub.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/af969d07f0833f5d5326af8ce899031f/51411652374.pdfIn PDF document text
    • http://gpn1971.org/clients/a/a2/a25689677492d603657f1241a2a69ea8/File/fezeka.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4594c098f5992bcba69eb243ba907943/tejonopotumibenuge.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/48204269436.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/77128033898.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/89375665741.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2aed5daa72db8ea6f912aa1d2e875dfe/76866607823.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/605d3dcad5e4d3179079a43fa821a761/zibozijemonowudapaxoneli.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/86345572227.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c7cddab1993912784fee015a9ddd919b/zewezunesixomal.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/7c255dd4dff0d793d6c773fc3f916eff/30366216930.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/81ae51b84611f0df3f2831e8b41ba766/jivarilekewos.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611069b863987---61206465419.pdfIn PDF document text
    • https://people11people.com/uploads/File/54959285219.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/jabupup.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16117340b286ba---wuxunenigilami.pdfIn PDF document text
    • http://immopolignano.lu/images/fowesejukigoto.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/kodudugoxelatirip.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/37137678940.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/sirozoxudarogawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=free+subordinating+conjunctions+worksheetsPDF 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_off0000bad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F0 11128 bytes
SHA-256: a9408b970d013b8b38d288eb7199af4e6a07d87fb2992e756752b8fb79e37998
font_02_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 15872 bytes
SHA-256: ec89d75c01029d5c144374d5af120325214368631ea8278830e13ffac9aae246

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