Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0182647d0a62b1d…

MALICIOUS

PDF

84.8 KB Created: 2021-08-16 06:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b590f4c99386d535f27695bb64479f74 SHA-1: b5f65ae7f9fb9fe9923adc94d259ce97ad30793c SHA-256: d0182647d0a62b1d3b283f57a8cdf448b28c2e09719cdd18fcd23423958aff4c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555.003 Credentials from Password Stores

The PDF was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating it's a credential phishing lure for MFA or one-time codes. The document body is heavily obfuscated, but the presence of numerous links, some pointing to compromised CMS uploads and disposable hosting, suggests a link farm designed to redirect users to phishing pages. No scripts were extracted, but the overall structure and heuristics strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://franzoesischebulldoggen.eu/userfiles/file/57155140024.pdf In PDF document text
    • http://escritacontabilidade.net/fotos/news/file/75787566436.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/33301433316.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/27212999406.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/ruwonuxajuw.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb243834d---83164256097.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/xetedorerizojotugesom.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/60a2677cc59da05e2a2200be7bae92fc/tinagivobobolalano.pdfIn PDF document text
    • http://jarosi.hu/files/file/36748974310.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/wolamafaparukiwodevu.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a4b58c68---49541790819.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/gefowuvaluvak.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/19052861328.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/kujotajamazijukadaf.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/78811065171.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/3f58c77bde1cba2fc8542cff6b44ded2/82533394818.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f5ae825912bd833dec174de7bc554333/41806620021.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607656cd5bd81---6613107897.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/25309938322.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c6afb6246---87457965508.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/69541915590.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb1cda7e26---28586106426.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/2727816232.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/tikikureserijaxi.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/patezotokovowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=jsc+result+2016+bd+marksheet+teletalkPDF 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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 11104 bytes
SHA-256: 257c486184b2ac62a212fde56464dd007a2bbde824930527067a6f3a5475f4c7
font_02_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 17352 bytes
SHA-256: 6a5e6820618be47a0017815df3d6fee7b38533bd1da2e135a5e3bb9313b0bea1

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