Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0f1cee6754674b…

MALICIOUS

PDF

93.0 KB Created: 2021-03-18 04:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d83f461008de03d18c1523507046b38 SHA-1: b3b68522204518da59cb3da7edabfadf4f64b6e7 SHA-256: ed0f1cee6754674bbcf56135a5fe7242d2379769d7e078e165e1ccbb783ee6b6
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that impersonates a worksheet answer key, a common lure for phishing attacks. The PDF structure and embedded content suggest an attempt to redirect the user to the malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=checks+and+balances+in+action+worksheet+answer+key
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/nowoguzes.pdf
    • http://dressnbuy.com/dawivimeguzeop66t.pdf
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60152bea30e56.pdf
    • https://cdn-cms.f-static.net/uploads/4384825/normal_601d90c650799.pdf
    • https://cdn-cms.f-static.net/uploads/4410016/normal_5fdba838eebfd.pdf
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/a3e85e2d37bf9.pdf
    • http://gejokakop.mygamesonline.org/canon_powershot_sx100_is_sd_card.pdf
    • http://nukels.xyz/jotosasomi819ur.pdf
    • https://sopivumebisul.weebly.com/uploads/1/3/1/4/131413603/xitazegofofiju_topekem_mutuwilokugikop.pdf
    • http://natbeach.space/nfs_heat_studio_not_working_ps4hueb3.pdf
    • http://trickyturkey.com/a_monster_in_paris_full_movie_in_hindi_free_downloadx2jle.pdf
    • http://yesitalia.fun/69621783602k1f30.pdf
    • https://static.s123-cdn-static.com/uploads/4485172/normal_5fe55f1bc8883.pdf
    • http://labifovejes.mypressonline.com/33388109697.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://redifigikutusoj.myartsonline.com/rinnai_gas_stove_price_in_pakistan.pdf
    • https://uploads.strikinglycdn.com/files/9a95df93-a86a-469d-8a84-00f97fb06f00/wizageku.pdf
    • http://padegijogul.atwebpages.com/how_often_to_clean_jacuzzi_jets.pdf
    • https://uploads.strikinglycdn.com/files/423d418d-1898-4638-8782-f2947a552494/dezeliviju.pdf
    • http://ledufowi.myartsonline.com/89748774780.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001263e.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263E 2828 bytes
font_01_sfnt_off00013039.bin
2fb7c03f656ac3c92da60e29d936e39d195eda92790d3d4573f9b43e1b74e96f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13039 5332 bytes
font_02_sfnt_off00014263.bin
167f295388879544db0975c793e570769047b5c994f7e12fc40c7896064919f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14263 10472 bytes