Malicious PDF — malware analysis report

Static analysis result for SHA-256 7227fcac6d5fcedd…

MALICIOUS

PDF

73.4 KB Created: 2021-06-19 10:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b3e7e6ae8c4263c19f64fc557e50826f SHA-1: fb9bb37fae81d604f9f9c4cc0494d405aa95593c SHA-256: 7227fcac6d5fceddba9ec6d6cfd011e85d18f0cfd4b264d0ecf6c86c0a7b84cc
176 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a number for issues like billing or refunds. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious sites or initiate fraudulent phone interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bettaletroom.com/file_media/file_image/file/80488047172.pdf In PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a00a9648---29403860971.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/n2ek5bi8v3vguc0q7icukm70q6/sototelolovovek.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4b7e2a0b08f8453d4297733537e4aae3/71023267234.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/321571f0ce1883fb2aa894353b78d42e/54641612658.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c52e0f1b3a2---mijakuxadibijidogiwu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2a2bd4f7---97270743516.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11874205f6---govikidexobezakezaxadowos.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609700b059f55---70512909822.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7eea0e7bf---90910732673.pdfIn PDF document text
    • https://mollis.rs//files/pipupo.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/034902d42a59d9b53d7c2fc63cc76545/vutukipineresepetadabat.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/okv7jbveqc4svuoa2snep9uou2/21108295013.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2q8i1b0vq1r90bgjiar93b2ibb/70729981823.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9156f93f9d---72437258550.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/121c6337ecd808222d76a1ea75d11b54/7119703043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=desi+village+new+mmsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5D 4656 bytes
SHA-256: 7b15d077922f3f9378267911c29378da9a1755c8f5be5a203037a34d79661584
font_01_sfnt_off0000ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 2876 bytes
SHA-256: 6f432c26725eea8dee6c2a67a974724f2b08e97df9f1ad22988ccde1a53394bc
font_02_sfnt_off0000d68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68F 10368 bytes
SHA-256: 9e6e876154244c8d6acc3b35c0da05efcf8a6607055fff8ce45bf3806ad9b327
font_03_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_04_sfnt_off000107bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BD 4312 bytes
SHA-256: 459c70912b6f2bf9294f09e5d57dec350d188c25ec235f365a88710075c8501a

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