Malicious PDF — malware analysis report

Static analysis result for SHA-256 facff956b6dd6bda…

MALICIOUS

PDF

87.5 KB Created: 2021-03-22 12:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943da6b440d1a40608f758251faffe87 SHA-1: 747a3e03abcf14bd00d0be5d9536261f365d00d0 SHA-256: facff956b6dd6bda435d80fe131220660a086ad8bd4c790aa56416585fbb773e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to educational content ('Naming functional groups worksheet'). The presence of multiple external URLs indicates a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/wix?keyword=naming+functional+groups+worksheet
    • http://sevezor.scienceontheweb.net/92635755514.pdf
    • https://cdn.sqhk.co/molavagew/eUNhihf/43398885481.pdf
    • http://valuburikodajad.medianewsonline.com/gozidakuvelivedamareraxi.pdf
    • https://cdn-cms.f-static.net/uploads/4450636/normal_601293a6a2608.pdf
    • https://cdn.sqhk.co/kososojog/jbhaCc7/wiwasosomaxokuji.pdf
    • http://ninuxalezopo.getenjoyment.net/94749376620.pdf
    • https://cdn.sqhk.co/vibejimipu/gghgjeG/florida_state_driving_test_study_guide.pdf
    • https://cdn.sqhk.co/lojibuwe/MgeQkjN/lego_hidden_side_fire_truck_boss.pdf
    • https://cdn.sqhk.co/ketalidukepi/fnicmjg/gozixuluzodidis.pdf
    • https://cdn.sqhk.co/nawamuzimosu/haNpeDY/bullworker_exercise_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5ff5a8306fa00.pdf
    • http://jedusajinud.mygamesonline.org/vuxepimokusulibu.pdf
    • https://cdn-cms.f-static.net/uploads/4476567/normal_60295590cafd9.pdf
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5feeef1f49cd3.pdf
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdf
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fcaa30ae6c5d.pdf
    • https://cdn-cms.f-static.net/uploads/4484103/normal_6040c2f53cb08.pdf
    • https://cdn-cms.f-static.net/uploads/4454287/normal_6033f2396062d.pdf
    • https://cdn-cms.f-static.net/uploads/4389095/normal_60369b7d95b59.pdf
    • http://gelupulofevabek.medianewsonline.com/attached_is_the_file.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepawomokatuke.myartsonline.com/is_chronicle_of_a_death_foretold_a_true_story.pdf
    • http://padusij.onlinewebshop.net/4284165192.pdf
    • http://nanaxidimidi.atwebpages.com/niwifamu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117b2.bin
e97d53e05f44ac9d22102e6607e9868d033f92565270f39e13bbfedb8c4af041
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B2 5556 bytes
font_01_sfnt_off00012a8f.bin
7da57ecc87467bce28923c26f7df5ed42a8a267a49b81dc8c9a7172e0c1ec438
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 11168 bytes