Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40322b02d4d7613…

MALICIOUS

PDF

84.0 KB Created: 2021-03-16 05:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2b1936778f9bced65ad5d25d99559d97 SHA-1: b0baf9ccb68c9d8bb4c71acd4b94100e67271164 SHA-256: e40322b02d4d76131aa47f1aa01efc4d21511beef3b22ba6916cee9da26d9189
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The presence of an embedded URL pointing to 'nipisod.ru' and a heuristic indicating a visual download button suggests a phishing attempt to trick users into downloading further malware. No scripts were extracted, but the overall pattern indicates a malicious document designed for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/wix?keyword=control+systems+engineering+nise+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377908/normal_6043c1aad2ae3.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/TLsTjbr/used_super_shot_basketball_arcade_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fe2ebbbb7489.pdfIn PDF document text
    • http://bestgirl69.com/elchronicle_characters_listxnhl4.pdfIn PDF document text
    • http://sun-italy.space/uv_5r_manual6ar5g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5fdbb11fb58ee.pdfIn PDF document text
    • http://vipmanmarket.space/98299669169wxi4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_603503b627017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fefb9082b3b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ff996d1252e7.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/D3hegeX/rumble_on_automotive_reviews.pdfIn PDF document text
    • http://missunik.space/food_supplier_list_template6eoiy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403561/normal_5ffa6950c7fbc.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/jcmXcgh/wobikoligewaw.pdfIn PDF document text
    • http://mydenverneighborhoods.com/tovoladasusakijixazuglad.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/AcEhacA/72461752000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/tenimozodiwexobilezunune.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/74631697022.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/2007_chevrolet_tahoe_ltz_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/angel_tv_all_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/us_army_enlisted_promotion_trend_report.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 5160 bytes
SHA-256: b7321c1ac71252c01d21a8586adbfb01156a9847610845fd55ebc2c90acd65cb
font_01_sfnt_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 10928 bytes
SHA-256: 984515ed3a7353f98fb94296db0058c5a06808a3a8e0ad5af8c89a49cffee72d

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