Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e599864a5f8666…

MALICIOUS

PDF

78.5 KB Created: 2021-05-13 07:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb75ba30ac1422531277eab42c6c944c SHA-1: e485333d18684cc0aa2fb0f6328f63945b82451c SHA-256: d7e599864a5f8666c538e25b6877ec5c4e5dd2dc5fad8aa85b93e5f57e4ae36c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs point to external PDF files hosted on file-sharing services, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/ladurokuwomifefam.pdf
    • https://cdn-cms.f-static.net/uploads/4452835/normal_602a88fbd9946.pdf
    • https://cdn.sqhk.co/sakixowofeg/ggDZcgd/42198830838.pdf
    • https://cdn-cms.f-static.net/uploads/4476429/normal_6049e73a2919c.pdf
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fc7ce3b83959.pdf
    • https://cdn.sqhk.co/retugatodof/j6ifHjb/65481643630.pdf
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/9be7bfad.pdf
    • https://cdn.sqhk.co/fafujedajir/yid7Xgg/85868431812.pdf
    • https://static.s123-cdn-static.com/uploads/4404133/normal_5fcb47682d7b9.pdf
    • https://cdn.sqhk.co/nizufalagef/bNiigeB/boy_to_girl_voice_changer_app_for_android.pdf
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/7444174.pdf
    • https://cdn-cms.f-static.net/uploads/4446649/normal_604dbf4bc3a95.pdf
    • https://cdn.sqhk.co/xevowuto/jt8igq7/82646075455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=how%20to%20use%20snark%20tuner%20on%20violin
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_20638163ba274fdf9de7f8932793a235.pdf?index=true
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_48001d455759443bb2c2ef41927ba03c.pdf?index=true
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_a896abc587554fbda880a7eee05c8193.pdf?index=true
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_416c24c7c11843ceaf3989ded4b65268.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f8.bin
7d79ec3ddab07d5080623ff2bb7e7ce69eff98c0f3ca9d0c1c6d3605ea0cd9c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 4856 bytes
font_01_sfnt_off0001089f.bin
605e4306e3059be6722ff5dac8f9cbb12b95d7f08c9010bc642928bef6623675
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 10664 bytes