Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db6066056f2bdde…

MALICIOUS

PDF

77.4 KB Created: 2020-12-18 19:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4d96eee122ba358994789c82026b2cc8 SHA-1: 84c93c987181957711f2d5e14e676f8dfc250db1 SHA-256: 9db6066056f2bdded43e5dd87bb307b05e1f6012bb913777cab5f3e90f2d51e9
184 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to other PDFs, and one prominent URL related to 'iphone 4s 4g price in india'. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or a scam. The document body is heavily obfuscated and unreadable, but the presence of external links and the heuristic firings suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/123?utm_term=iphone+4s+4g+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473388/normal_5fb33b2d34be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_5fa255d3d7bd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fc1714726edb.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/896334cc5.pdfIn PDF document text
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/7562098.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/4494655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f8fb46ac2a1c.pdfIn PDF document text
    • https://xujajogasugoni.weebly.com/uploads/1/3/4/5/134514057/3313318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8744f801c19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf72f5147b14804f87937/1606285105403/mifoven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6f03f2-6712-4afe-90c5-a1fa1f5d294e/lamesujavuxodadepej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e15d7d0c8f249d40b1da/t/5fc25170f8cdb769c62f2e91/1606570353419/the_business_model_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62fe2dd96f5918e6bcf6/1606378240422/anker_ultra_compact_bluetooth_keyboard_instructions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc403570fb44d1c92e02/1606286402577/88324055351.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50b922e537a05ef23ad8d/t/5fcd49913ff1011540ffd38c/1607289254885/muvazadeforifijakoj.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://scripts.sil.org/OFLIn 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_off0000da5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 5328 bytes
SHA-256: d57d7b2e61348b9fdd60c4eec6bacf946e1ff16b77982bbb3cbf4242d338e050
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 10852 bytes
SHA-256: 6db24782c9f60fcc25d77aeba1075f20bd2042bd56eda9442a76f5c9797befdb
font_02_sfnt_off0001118f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118F 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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