Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aa8c8f279ac898…

MALICIOUS

PDF

76.5 KB Created: 2021-09-09 21:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 96267f4d17212bd499938850302256ad SHA-1: d9a68dba16b57590915161ab438a70395925647f SHA-256: 29aa8c8f279ac89819930ea694353906529e1893a89a044b926668f345980506
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs that form a link farm, pointing to various compromised websites and potentially disposable hosting. The primary purpose appears to be directing users to external malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=turn+my+android+into+an+iphone PDF link annotation
    • http://lapawan15.com/shop/fck_file/file/ragakatobasujuw.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/59319748004.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/84170380816.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/94704616003.pdfPDF link annotation
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f015b0b3ac---vuviwegewebubemabiwur.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/jikomav.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/xakebol.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/60183756329.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/zaxegodevolinozemazuj.pdfIn PDF document text
    • https://jss-moms.si/upload/File/dizotebipikuz.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/bomilizuwezo.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/1913298484.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7cda2d8a2---96421688639.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a47e121163---36125096345.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613923b0ac727---zatuzibizek.pdfIn PDF document text
    • http://nemochem.cn/upload/files/xejunizedebumokamaro.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/4242897312.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/dosoki.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1be17ae5---50974207832.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/vozerur.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/1673929321.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/6138fc3bd105c.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/20611913532.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/67777333769.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16130744087e3e---26200193166.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/leboxuwize.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_off0000c87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 16872 bytes
SHA-256: 257603931df1d71f457e9945d6c3fd873d26ada9efd592cf88c78ffe933e6de4
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 10620 bytes
SHA-256: 3e7dfd0555f8e0ce23d99e2e3fa03e362b93de6bd54fb2aa562f182b90951c56
font_02_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1