Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f4ee66436f79c4…

MALICIOUS

PDF

87.2 KB Created: 2020-12-25 03:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4146958016c7971bc5490c33b5981318 SHA-1: 8c00abbb69fe0997e0185d3a30d353552415888b SHA-256: a7f4ee66436f79c453683f7e883e91dc9c76ca663a97f9049e0654949e3f950f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing operation. The document body, though heavily corrupted, contains text related to MP3 downloads, which is likely a lure to entice users to click on the malicious URLs embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://trafftec.ru/strik?utm_term=botal+bhar+daru+chadi+dj+mp3+song+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481272/normal_5fabdcf74fc4b.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/bif75hg/word_crossy_6164.pdfIn PDF document text
    • https://ragurukenawuxif.weebly.com/uploads/1/3/4/6/134667210/6940145.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/2a5039a31b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f972c2d36db4.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/0K3njc3/fudegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_5fdcf11fcfedc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_5fa96a03f1d3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8fe3f6b3-81c9-4b92-ac2a-fd3a20d53a04/nemowulevi.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/zinexojagepetexipijeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/dai_viet_su_ky_toan_thu.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/39034321792.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/adobe_character_animator_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 5772 bytes
SHA-256: 0475443cb0efbeaf7661f035d9a5ae62c6d4c6a7379c5d4dd5dd86b5d734502e
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 12112 bytes
SHA-256: 9a9214f9a1e1baa29459363d55d1a1e8473871523e4a4943c726a96a8a149754
font_02_sfnt_off00012c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C04 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off000140cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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