Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fec84c3d9ed0569…

MALICIOUS

PDF

93.0 KB Created: 2021-03-08 18:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 324de65c1d4838bb820898dec576d34b SHA-1: dffd7cacb7aa8e230802f60f5c2601d665eace43 SHA-256: 7fec84c3d9ed0569bc8a5c966729d9cffe48280da35d04f0442d2620a5e7ff7d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs pointing to disposable hosting, characteristic of a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's used to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/123?utm_term=chungha+gotta+go++lagu PDF link annotation
    • https://puzifisabu.weebly.com/uploads/1/3/1/3/131378936/1261472.pdfIn PDF document text
    • https://wosixuluwur.weebly.com/uploads/1/3/1/0/131071196/2091015.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/bDic8fs/zedegufupafopujupiz.pdfIn PDF document text
    • https://kuxapularutamux.weebly.com/uploads/1/3/5/9/135984678/minuni_tuladekufona_sosuwawabifek_dibefepon.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/c2b16b5488.pdfIn PDF document text
    • https://vilaferadir.weebly.com/uploads/1/3/4/7/134771168/4892ba.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/line_6_hx_stomp_volume_pedal.pdfIn PDF document text
    • https://bevozuvegala.weebly.com/uploads/1/3/3/9/133999301/3a7c4.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/8Pjaij2/tap_chest_idle_clicker_apk.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/26658583831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keregimuw.onlinewebshop.net/machine_learning_prediction_models_python.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_0d8a06bc4c9447f0809f3c5f5c5abbc8.pdf?index=trueIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_0aaaab04bb1f4e90b1f7982a9d014049.pdf?index=trueIn PDF document text
    • http://vimixof.onlinewebshop.net/delta_band_saw_parts_28-245.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_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 13444 bytes
SHA-256: 5858af86916688f02e31f7c1c57e4ceab30e07bebfea9d8deaaa0f422dbecb16
font_01_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 4576 bytes
SHA-256: 1b44e804164303aadd4d779d1a42c23e56afc1bca0a727e1559c7b4903bc2c51
font_02_sfnt_off00012ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA6 10964 bytes
SHA-256: ca934d55b724c463987e243f448245a8ff78414019a7e8d46b323772e6fd4c7a
font_03_sfnt_off0001514d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514D 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

Open this report in the interactive analyzer, or submit your own file for analysis.